Acts 16:1-3

Now Paul traveled to Derbe and also to Lystra. A disciple named Timothy was there, the son of a Jewish woman who was a believer [in Christ], however, his father was a Greek. Timothy was well spoken of by the brothers and sisters who were in Lystra and Iconium. Paul wanted Timothy to go with him [as a missionary]; and he took him and circumcised him because of the Jews who were in those places, since they all knew that his father was a Greek.