Acts 16

Introduction

Acts 16 marks a turning point in the expansion of the early church, as the gospel crosses from Asia into Europe for the first time. The chapter opens with Paul's second missionary journey already underway: he revisits churches established during his first journey and recruits Timothy as a new companion. After a series of divine redirections -- the Holy Spirit preventing the missionaries from preaching in the province of Asia and in Bithynia -- Paul receives a nighttime vision of a Macedonian man calling for help. The vision leads the team to Philippi, a leading Roman colony in Macedonia, where the gospel takes root in Europe.

The Philippi narrative is marked by sharp contrasts. Three very different people come to faith: Lydia, a prosperous businesswoman and God-fearer; a slave girl delivered from demonic oppression and exploitation; and a Roman jailer on the verge of suicide. Together they represent a cross-section of Greco-Roman society -- wealthy and poor, free and enslaved, female and male, Gentile God-fearer and pagan. The chapter also introduces the first "we" passage in Acts (v. 10), indicating that Luke himself joined the missionary team at Troas. Throughout, Luke shows that the advance of the gospel is directed by the Spirit of God, often through unexpected circumstances, including imprisonment and earthquakes.


Timothy Joins Paul and Silas (vv. 1-5)

1 Paul came to Derbe and then to Lystra, where he found a disciple named Timothy, the son of a believing Jewish woman and a Greek father. 2 The brothers in Lystra and Iconium spoke well of him. 3 Paul wanted Timothy to accompany him, so he took him and circumcised him on account of the Jews in that area, for they all knew that his father was a Greek.

4 As they went from town to town, they delivered the decisions handed down by the apostles and elders in Jerusalem for the people to obey. 5 So the churches were strengthened in the faith and grew daily in numbers.

1 He came also to Derbe and to Lystra. And there was a disciple there named Timothy, the son of a Jewish woman who was a believer, but his father was a Greek. 2 He was well spoken of by the brothers in Lystra and Iconium. 3 Paul wanted this man to go with him, and he took him and circumcised him because of the Jews who were in those places, for they all knew that his father was a Greek.

4 As they went through the towns, they delivered to them the decisions that had been reached by the apostles and elders in Jerusalem, for them to keep. 5 So the churches were being strengthened in the faith and were increasing in number day by day.

Notes

Timothy is introduced with a mixed heritage that will prove significant: his mother was a Ἰουδαίας πιστῆς ("believing Jewish woman"), but his father was Ἕλληνος ("a Greek"). Timothy's mother Eunice and grandmother Lois are named in 2 Timothy 1:5 as women of sincere faith who had instructed Timothy in the Scriptures from childhood (2 Timothy 3:15). That Timothy was already a μαθητής ("disciple") indicates he had come to faith, likely during Paul's first visit to Lystra (Acts 14:6-20).

Paul's decision to circumcise Timothy is notable, especially since the Jerusalem Council had just ruled that Gentile converts need not be circumcised (Acts 15:19-29). The key distinction is that Timothy was not a Gentile -- under Jewish law, the child of a Jewish mother was Jewish, and an uncircumcised Jewish man would have offended the Jewish communities Paul hoped to reach. Paul circumcised Timothy not as a requirement for salvation but as a matter of missionary strategy, removing an unnecessary obstacle to ministry among Jews. This stands in contrast to Paul's refusal to circumcise Titus, who was fully Greek (Galatians 2:3). The verb περιέτεμεν ("he circumcised") is stated plainly; Luke sees no contradiction with the Jerusalem decree because the cases are fundamentally different.

The word ἐμαρτυρεῖτο ("he was well testified of") in verse 2 is in the imperfect passive, indicating an established reputation. Timothy's good standing in both Lystra and Iconium confirmed his suitability as a companion for Paul's mission.

The δόγματα ("decisions" or "decrees") delivered in verse 4 refers to the rulings of the Jerusalem Council (Acts 15:23-29). This word carried the weight of official pronouncements in the Greco-Roman world and underscores the authority of the apostolic decision.

Interpretations

Paul's circumcision of Timothy raises questions about the relationship between gospel freedom and cultural accommodation. Some interpreters see this as a direct application of Paul's principle of becoming "all things to all people" (1 Corinthians 9:19-23) -- a willingness to observe Jewish customs when they serve the mission without compromising the gospel. Others note a tension with Paul's language in Galatians 5:2-4, where he warns that anyone who accepts circumcision as necessary for salvation has "fallen from grace." Most Protestant commentators resolve the tension by concluding that Timothy's circumcision was a voluntary act of cultural sensitivity (since Timothy was halakhically Jewish), not a soteriological requirement -- the very point the Jerusalem Council had established.


The Spirit's Guidance and the Macedonian Vision (vv. 6-10)

6 After the Holy Spirit had prevented them from speaking the word in the province of Asia, they traveled through the region of Phrygia and Galatia. 7 And when they came to the border of Mysia, they tried to enter Bithynia, but the Spirit of Jesus would not permit them. 8 So they passed by Mysia and went down to Troas.

9 During the night, Paul had a vision of a man of Macedonia standing and pleading with him, "Come over to Macedonia and help us." 10 As soon as Paul had seen the vision, we got ready to leave for Macedonia, concluding that God had called us to preach the gospel to them.

6 They passed through the Phrygian and Galatian region, having been forbidden by the Holy Spirit to speak the word in Asia. 7 And when they came opposite Mysia, they attempted to go into Bithynia, but the Spirit of Jesus did not allow them. 8 So passing by Mysia, they went down to Troas.

9 And a vision appeared to Paul during the night: a certain Macedonian man was standing and urging him, saying, "Cross over to Macedonia and help us." 10 And when he had seen the vision, immediately we sought to go to Macedonia, concluding that God had called us to proclaim the good news to them.

Notes

This passage depicts divine guidance through restriction. The verb κωλυθέντες ("having been forbidden/prevented") is an aorist passive participle -- the Holy Spirit actively blocked Paul's intended route. Luke does not explain how this prohibition was communicated, whether through prophecy, inner conviction, or outward circumstances. The phrase τὸ Ἅγιον Πνεῦμα ("the Holy Spirit") in verse 6 shifts to τὸ Πνεῦμα Ἰησοῦ ("the Spirit of Jesus") in verse 7. This unusual expression, found only here in Acts, identifies the Holy Spirit as the Spirit of the risen Jesus and reflects the close association between Christ and the Spirit in early Christian theology (compare Romans 8:9, Philippians 1:19). The province of "Asia" here refers not to the continent but to the Roman province in western Asia Minor, whose capital was Ephesus -- a city Paul would later reach on his third journey (Acts 19:1).

The verb ἐπείραζον ("they were attempting/trying") in verse 7 is imperfect, suggesting repeated effort to enter Bithynia, each time rebuffed. This sequence of closed doors -- east and then north -- drove the missionaries westward to Troas on the Aegean coast, positioned for a sea crossing to Europe.

The ὅραμα ("vision") in verse 9 shows a Macedonian man παρακαλῶν ("urging, pleading") Paul to cross over. The verb βοήθησον ("help us!") is an aorist imperative, conveying urgency. The man's identity is not specified -- some have suggested it was Luke himself, a possible Macedonian, but the text leaves the question open.

Verse 10 marks the first appearance of the "we" narrative in Acts: ἐζητήσαμεν ("we sought"). The abrupt shift from "they" to "we" indicates that Luke joined the party at Troas. The verb συμβιβάζοντες ("concluding, putting together") suggests that the team reasoned from the evidence -- the closed doors and the vision -- that God was calling them to Macedonia. The final verb εὐαγγελίσασθαι ("to proclaim the good news") states the purpose: this was not mere travel but a Spirit-directed mission to bring the gospel to a new continent.


Arrival in Philippi and the Conversion of Lydia (vv. 11-15)

11 We sailed from Troas straight to Samothrace, and the following day on to Neapolis. 12 From there we went to the Roman colony of Philippi, the leading city of that district of Macedonia. And we stayed there several days.

13 On the Sabbath we went outside the city gate along the river, where it was customary to find a place of prayer. After sitting down, we spoke to the women who had gathered there.

14 Among those listening was a woman named Lydia, a dealer in purple cloth from the city of Thyatira, who was a worshiper of God. The Lord opened her heart to respond to Paul's message. 15 And when she and her household had been baptized, she urged us, "If you consider me a believer in the Lord, come and stay at my house." And she persuaded us.

11 So setting sail from Troas, we ran a straight course to Samothrace, and the next day to Neapolis, 12 and from there to Philippi, which is a leading city of that district of Macedonia, a Roman colony. We stayed in this city for some days.

13 On the Sabbath day we went outside the gate to a riverside, where we supposed there would be a place of prayer, and we sat down and spoke to the women who had gathered there.

14 A certain woman named Lydia, a dealer in purple cloth from the city of Thyatira, a worshiper of God, was listening. The Lord opened her heart to pay attention to what was being spoken by Paul. 15 And when she and her household were baptized, she urged us, saying, "If you have judged me to be faithful to the Lord, come and stay at my house." And she prevailed upon us.

Notes

The travel itinerary in verses 11-12 reflects Luke's eyewitness detail. The "straight course" to Samothrace indicates favorable winds -- the same voyage in the opposite direction took five days (Acts 20:6). Philippi is described with civic precision as a κολωνία ("colony"), a Latin loanword designating a Roman military colony. Philippi had been refounded by Augustus after the battle of Philippi in 42 BC, and its citizens held Roman citizenship and were governed by Roman law. That status becomes crucial in the story's climax (vv. 37-39).

The absence of a synagogue in Philippi (which required a quorum of ten Jewish men) is implied by the missionaries going to a προσευχήν ("place of prayer") by the river. This was a common alternative for Jewish worship in cities with small Jewish populations. That only women had gathered suggests the Jewish community in Philippi was very small.

Lydia is described as a πορφυρόπωλις ("dealer in purple cloth"), a term found only here in the New Testament. Purple dye was expensive -- extracted from the murex shellfish or from madder root -- and Thyatira (in the province of Asia, modern western Turkey) was known for its dye-works. Lydia was likely a woman of considerable means, as shown by her owning a house large enough to host Paul's team (v. 15). She is called σεβομένη τὸν Θεόν ("a worshiper of God"), a technical term for Gentiles who worshiped the God of Israel and attended the synagogue but had not undergone full conversion to Judaism.

The theological center of this passage is verse 14: ἧς ὁ Κύριος διήνοιξεν τὴν καρδίαν ("whose heart the Lord opened"). The verb διήνοιξεν ("opened") is the same word used of Jesus opening the disciples' minds to understand the Scriptures in Luke 24:45. The infinitive προσέχειν ("to pay attention, to give heed") indicates that God's opening of her heart enabled her to respond to the message. Luke presents both divine initiative and human response as real: God opens the heart, and Lydia attends to the word.

Lydia's baptism along with her οἶκος ("household") is the first of two household baptisms in this chapter (see v. 33). Her invitation uses a first-class conditional: εἰ κεκρίκατέ με πιστὴν τῷ Κυρίῳ εἶναι ("if you have judged me to be faithful to the Lord") -- she assumes the condition is true and draws the logical consequence. The verb παρεβιάσατο ("she prevailed upon, urged strongly") suggests warm insistence rather than mere politeness. Lydia's home becomes the first house church in Europe and the base of operations for the Philippian mission.

Interpretations

The phrase "the Lord opened her heart" in verse 14 has been important in debates about the nature of grace and conversion. Reformed and Calvinist interpreters emphasize that Lydia's faith was the result of God's prior, effectual action -- the Lord opened her heart before she believed, demonstrating that saving faith is a gift of God's sovereign grace rather than an autonomous human decision. Arminian interpreters, while affirming that God's grace is necessary and precedes conversion, understand the opening of Lydia's heart as an enabling grace (prevenient grace) that made it possible for her to respond freely without making that response inevitable. Both traditions agree that Lydia could not have believed without God's initiative; they differ on whether God's opening of her heart was irresistible or resistible.

The household baptisms in this chapter (Lydia's household in v. 15 and the jailer's in v. 33) are also relevant to the debate about infant baptism. Paedobaptist traditions (Reformed, Presbyterian, Lutheran) note that "household" likely included children and possibly infants, and see these accounts as supporting the inclusion of covenant children in the sign of baptism. Credobaptist traditions (Baptist, many evangelicals) respond that the text gives no indication that infants were present, and that the pattern in Acts consistently ties baptism to personal faith.


The Slave Girl with a Spirit of Divination (vv. 16-18)

16 One day as we were going to the place of prayer, we were met by a slave girl with a spirit of divination, who earned a large income for her masters by fortune-telling. 17 This girl followed Paul and the rest of us, shouting, "These men are servants of the Most High God, who are proclaiming to you the way of salvation!" 18 She continued this for many days. Eventually Paul grew so aggravated that he turned and said to the spirit, "In the name of Jesus Christ I command you to come out of her!" And the spirit left her at that very moment.

16 Now it happened that as we were going to the place of prayer, a certain slave girl who had a spirit of Python met us. She was bringing her masters much profit by fortune-telling. 17 She followed Paul and us, crying out, "These men are slaves of the Most High God, who are proclaiming to you a way of salvation!" 18 She kept doing this for many days. But Paul, having become greatly troubled, turned and said to the spirit, "I command you in the name of Jesus Christ to come out of her." And it came out that very hour.

Notes

The slave girl is described as having a πνεῦμα Πύθωνα ("a spirit of Python"). In Greek mythology, Python was the serpent that guarded the oracle at Delphi before being slain by Apollo. The term later came to be used for ventriloquists and soothsayers thought to be inspired by Apollo's prophetic power. Luke's use of this culturally specific term shows his awareness of pagan religious categories, while the exorcism demonstrates the authority of the name of Jesus over these powers.

The verb μαντευομένη ("practicing divination, fortune-telling") is significant. This is the only place this word appears in the New Testament, and it carries strongly negative connotations in the Greek Old Testament, where divination is repeatedly condemned (Deuteronomy 18:10, 1 Samuel 28:8). The girl's activity generated ἐργασίαν πολλήν ("much profit/business") for her κυρίοις ("masters/owners") -- the plural suggests she was owned by a syndicate exploiting her condition.

The girl's declaration in verse 17 is technically accurate: Paul and his companions are indeed δοῦλοι τοῦ Θεοῦ τοῦ Ὑψίστου ("slaves of the Most High God") who proclaim ὁδὸν σωτηρίας ("a way of salvation"). Yet Paul did not welcome this testimony. The title "Most High God" was used in pagan contexts for Zeus and could create syncretistic confusion. The phrase "a way of salvation" (with the indefinite article in some manuscripts) could also suggest that Paul's message was merely one path among many. Just as Jesus refused testimony from demons who recognized his identity (Mark 1:24-25, Mark 3:11-12), Paul would not accept endorsement from a demonic source.

The verb διαπονηθείς ("having become greatly troubled/annoyed") in verse 18 describes deep vexation or distress rather than mere irritation. Paul's exorcism command -- Παραγγέλλω σοι ἐν ὀνόματι Ἰησοῦ Χριστοῦ ἐξελθεῖν ἀπ᾽ αὐτῆς ("I command you in the name of Jesus Christ to come out of her") -- echoes the authority Jesus gave his disciples to cast out demons. The immediacy of the result (αὐτῇ τῇ ὥρᾳ, "that very hour") shows the power of Christ's name over spiritual forces.


Paul and Silas Arrested and Imprisoned (vv. 19-24)

19 When the girl's owners saw that their hope of making money was gone, they seized Paul and Silas and dragged them before the authorities in the marketplace. 20 They brought them to the magistrates and said, "These men are Jews and are throwing our city into turmoil 21 by promoting customs that are unlawful for us Romans to adopt or practice."

22 The crowd joined in the attack against Paul and Silas, and the magistrates ordered that they be stripped and beaten with rods. 23 And after striking them with many blows, they threw them into prison and ordered the jailer to guard them securely. 24 On receiving this order, he placed them in the inner cell and fastened their feet in the stocks.

19 But when her masters saw that their hope of profit was gone, they seized Paul and Silas and dragged them into the marketplace before the authorities. 20 And bringing them to the magistrates, they said, "These men, being Jews, are greatly disturbing our city 21 and are advocating customs that are not lawful for us to accept or practice, since we are Romans."

22 The crowd rose up together against them, and the magistrates tore their garments off them and ordered them to be beaten with rods. 23 After inflicting many blows on them, they threw them into prison, commanding the jailer to guard them securely. 24 Having received such a charge, he put them in the inner cell and fastened their feet in the stocks.

Notes

The real motive behind the arrest is economic: the owners' ἐλπὶς τῆς ἐργασίας ("hope of profit") had departed with the spirit. But the charges they bring are political and ethnic, not religious. They frame the accusation around two points: first, that Paul and Silas are Ἰουδαῖοι ("Jews") -- appealing to anti-Jewish sentiment that was strong in Roman colonies -- and second, that they promote customs unlawful for Romans. The verb ἐκταράσσουσιν ("are throwing into turmoil/greatly disturbing") is a strong compound verb found only here in the New Testament, suggesting upheaval.

The στρατηγοί ("magistrates") are the duumviri, the two chief magistrates of the Roman colony, equivalent to praetors. Luke uses precise Roman terminology throughout this narrative. The punishment -- stripping and beating with rods (ῥαβδίζειν) -- was a Roman form of corporal punishment administered by lictors. Paul later references this beating in 1 Thessalonians 2:2 when he recalls having "suffered and been shamefully treated at Philippi." In 2 Corinthians 11:25 Paul says he was beaten with rods three times; this is likely one of those occasions.

The ξύλον ("stocks") in verse 24 was a wooden restraint that could be adjusted to spread the legs apart painfully. Combined with the "inner cell" -- the most secure and least comfortable part of the prison -- it represents the maximum security the jailer could impose. The jailer's diligence in following orders becomes important when the earthquake strikes.


The Earthquake and the Conversion of the Jailer (vv. 25-34)

25 About midnight Paul and Silas were praying and singing hymns to God, and the other prisoners were listening to them. 26 Suddenly a strong earthquake shook the foundations of the prison. At once all the doors flew open and everyone's chains came loose.

27 When the jailer woke up and saw the prison doors open, he drew his sword and was about to kill himself, presuming that the prisoners had escaped. 28 But Paul called out in a loud voice, "Do not harm yourself! We are all here!"

29 Calling for lights, the jailer rushed in and fell trembling before Paul and Silas. 30 Then he brought them out and asked, "Sirs, what must I do to be saved?" 31 They replied, "Believe in the Lord Jesus and you will be saved, you and your household." 32 Then Paul and Silas spoke the word of the Lord to him and to everyone in his house. 33 At that hour of the night, the jailer took them and washed their wounds. And without delay, he and all his household were baptized. 34 Then he brought them into his home and set a meal before them. So he and all his household rejoiced that they had come to believe in God.

25 Now about midnight, Paul and Silas were praying and singing hymns to God, and the prisoners were listening to them. 26 Suddenly there was a great earthquake, so that the foundations of the prison were shaken. Immediately all the doors were opened, and everyone's chains were unfastened.

27 The jailer, waking from sleep and seeing the prison doors standing open, drew his sword and was about to kill himself, supposing the prisoners had escaped. 28 But Paul called out with a loud voice, saying, "Do yourself no harm, for we are all here!"

29 And calling for lights, he rushed in and fell down trembling before Paul and Silas. 30 Then he brought them outside and said, "Sirs, what must I do to be saved?" 31 And they said, "Believe in the Lord Jesus, and you will be saved -- you and your household." 32 And they spoke the word of the Lord to him, together with all who were in his house. 33 And he took them at that hour of the night and washed their wounds, and he was baptized at once, he and all his household. 34 Then he brought them up into his house and set food before them, and he rejoiced greatly with his entire household, having believed in God.

Notes

Paul and Silas, beaten and locked in the innermost cell with their feet in stocks, are προσευχόμενοι ὕμνουν τὸν Θεόν ("praying and singing hymns to God"). The imperfect tense ὕμνουν suggests continuous singing. The verb ἐπηκροῶντο ("were listening") is a rare word found only here in the New Testament, meaning "to listen attentively" -- the other prisoners were listening closely.

The σεισμός μέγας ("great earthquake") is presented as a divine response. Its effects are strikingly precise: every door opens and every prisoner's chains are loosened, yet the building does not collapse. The verb ἀνέθη ("were loosened, came undone") describes the chains being released, from ἀνίημι ("to release, loosen").

The jailer's attempted suicide is understandable in Roman context. Under Roman military law, a guard who allowed prisoners to escape could face the same punishment those prisoners would have received. The jailer preferred death by his own sword to the shame and torture of execution. Paul's shout -- Μηδὲν πράξῃς σεαυτῷ κακόν ("Do yourself no harm!") -- is both a compassionate intervention and a demonstration that the power of God was at work not to enable escape but to bring salvation.

The jailer's question in verse 30 -- Κύριοι, τί με δεῖ ποιεῖν ἵνα σωθῶ; ("Sirs, what must I do to be saved?") -- uses Κύριοι as a respectful address ("sirs/lords"), though the word carries deeper resonance in context. The verb σωθῶ ("be saved") may have begun as a question about physical safety, but given the supernatural events and the slave girl's earlier proclamation (v. 17), it reaches toward something deeper.

The apostolic answer is a concise summary of the gospel: Πίστευσον ἐπὶ τὸν Κύριον Ἰησοῦν ("Believe in the Lord Jesus"). The aorist imperative Πίστευσον calls for a decisive act of trust. The preposition ἐπί with the accusative indicates directing one's faith toward and resting it upon Christ. The promise extends to his οἶκος ("household") -- not that his faith would automatically save them, but that the same promise of salvation through faith in Jesus was available to every member of his household, as verse 32 confirms: they spoke the word to all in his house.

The sequence that follows is marked by immediacy and tenderness: at that very hour of the night, the jailer washes their wounds (an act of care) and is baptized with his household (an act of faith). The Greek πεπιστευκὼς τῷ Θεῷ πανοικεί ("having believed in God with his whole household") in verse 34 uses a perfect participle, describing a settled state of faith, and the rare adverb πανοικεί ("with the whole household") appears only here in the New Testament.

Interpretations

The jailer's conversion is a key text in discussions about the nature of saving faith. The simplicity of the command "Believe in the Lord Jesus and you will be saved" has been central to evangelical soteriology, emphasizing that salvation comes through faith alone (sola fide) apart from works or religious rituals. Reformed interpreters note that the jailer's faith, like Lydia's, follows divine intervention (the earthquake), suggesting that God's sovereign action precedes and enables the human response of faith. Arminian interpreters emphasize the genuine call to personal decision in the imperative "Believe" and see the jailer as freely responding to the gracious opportunity God presented.

As noted above, the household baptisms in this chapter are also discussed in connection with infant baptism. In the jailer's case, verse 34 specifies that the entire household "rejoiced, having believed in God," which credobaptists argue indicates that all who were baptized were old enough to exercise conscious faith.


Paul Demands an Official Apology (vv. 35-40)

35 When daylight came, the magistrates sent their officers with the order: "Release those men."

36 The jailer informed Paul: "The magistrates have sent orders to release you. Now you may go on your way in peace."

37 But Paul said to the officers, "They beat us publicly without a trial and threw us into prison, even though we are Roman citizens. And now do they want to send us away secretly? Absolutely not! Let them come themselves and escort us out!" 38 So the officers relayed this message to the magistrates, who were alarmed to hear that Paul and Silas were Roman citizens. 39 They came to appease them and led them out, requesting that they leave the city. 40 After Paul and Silas came out of the prison, they went to Lydia's house to see the brothers and encourage them. Then they left the city.

35 Now when day came, the magistrates sent their officers, saying, "Release those men."

36 The jailer reported these words to Paul, saying, "The magistrates have sent word to release you. So now come out and go in peace."

37 But Paul said to them, "They beat us publicly, without a trial, men who are Roman citizens, and threw us into prison. And now are they sending us out secretly? Certainly not! Let them come themselves and lead us out." 38 The officers reported these words to the magistrates, and they were afraid when they heard that they were Roman citizens. 39 So they came and appeased them, and leading them out, they asked them to leave the city. 40 So they went out of the prison and went to Lydia's house. And when they had seen the brothers, they encouraged them and departed.

Notes

The morning-after scene reveals Paul's shrewd use of his Roman citizenship. The ῥαβδοῦχοι ("officers" or "lictors," literally "rod-bearers") were attendants who carried out the magistrates' orders, including administering beatings. The magistrates apparently assumed that a night in prison and a beating were sufficient and ordered their release.

Paul's protest is carefully constructed legal rhetoric. He identifies three violations of Roman law: first, they were beaten δημοσίᾳ ("publicly"), compounding the humiliation; second, they were punished ἀκατακρίτους ("uncondemned," without a trial), a direct violation of the Lex Valeria and Lex Porcia, which protected Roman citizens from punishment without due process; third, they are now being expelled λάθρᾳ ("secretly, quietly"), which would leave the public impression that they were guilty. The word ἀκατακρίτους is a rare legal term found only here and in Acts 22:25 in the New Testament.

The magistrates' fear on learning Paul and Silas were Ῥωμαίους ("Romans") was well-founded. Beating a Roman citizen without trial was a serious offense that could result in the magistrates' removal from office and severe penalties. By demanding a public escort, Paul accomplished two things: he vindicated the missionaries in the eyes of the Philippian community, and he provided legal protection for the fledgling church they were leaving behind. If the magistrates publicly acknowledged their error, they could hardly persecute the new believers after Paul departed.

Paul's final act before leaving is to visit Lydia's house, which had become the gathering place of the new Philippian church. The verb παρεκάλεσαν ("they encouraged") echoes the same root as the Macedonian man's plea in verse 9 -- the help Macedonia needed has been given, and now the new believers are strengthened for the journey ahead. This church at Philippi would become one of Paul's closest congregations, the recipients of an especially affectionate letter (Philippians 1:3-8).