Acts 21:39
But Paul said, I am a man which am a Jew of Tarsus, a city in Cilicia, a citizen of no mean city: and, I beseech thee, suffer me to speak unto the people.
Cross-reference
In Acts 21:37, the commander is surprised Paul speaks Greek; his Tarsus origin here explains that fluency.
Acts 9:30 shows Paul being sent to Tarsus, reinforcing his statement that Tarsus is his hometown.
Acts 22:3 repeats Paul's claim of being born in Tarsus of Cilicia, a nearly identical detail.
Acts 23:34 has the governor learn Paul is from Cilicia, confirming the province he names here.
In Acts 11:25, Barnabas goes to Tarsus to find Saul, establishing Tarsus as Paul's hometown, consistent with his claim here.
Acts 15:41 shows Paul strengthening churches in Cilicia, his home region, giving context to his origin.
In Galatians 1:21, Paul's later ministry in Syria and Cilicia confirms his roots in Tarsus of Cilicia, linking his birthplace to his missionary region.