Then he came to Derbe and Lystra. And behold, a certain disciple was there, named Timothy, the son of a certain Jewish woman who believed, but his father was Greek. 2 He was well spoken of by the brethren who were at Lystra and Iconium. 3 Paul wanted to have him go on with him. And he took him and circumcised him because of the Jews who were in that region, for they all knew that his father was Greek. 4 And as they went through the cities, they delivered to them the decrees to keep, which were determined by the apostles and elders at Jerusalem. 5 So the churches were strengthened in the faith, and increased in number daily. — Acts 16:1-5.
Paul comes to Derbe and Lystra. There he meets Timothy, whose mother is a Jewish believer but his father is Greek. He is well spoken of by the brethren of Lystra and Iconium. Paul wants to take him along with him. But first he gets Timothy circumcised because of the Jews who were in that region because they know that his father is Greek. So they go through the cities in that region, delivering the decrees to keep, as determined by the apostles and elders at Jerusalem. So the churches are strengthened in the faith and daily increase in number.