Galatians 2:3
But even Titus, who was with me, was not forced to be circumcised, though he was a Greek.
Acts 16:3
Paul wanted Timothy to accompany 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.
Acts 15:24
Since we have heard that some persons have gone out from us and troubled you with words, unsettling your minds, although we gave them no instructions,
1 Corinthians 9:20-21
To the Jews I became as a Jew, in order to win Jews. To those under the law I became as one under the law (though not being myself under the law) that I might win those under the law.
2 Corinthians 2:13
my spirit was not at rest because I did not find my brother Titus there. So I took leave of them and went on to Macedonia.
Galatians 5:2-6
Look: I, Paul, say to you that if you accept circumcision, Christ will be of no advantage to you.