Galatians 2:3
But although my companion Titus was a Greek they did not insist upon even his being circumcised.
Acts 16:3
and Paul desiring that he should accompany him on his journey, took him and circumcised him on account of the Jews in those parts, for they all knew that his father was a Greek.
Acts 15:24
As we have been informed that certain persons who have gone out from among us have disturbed you by their teaching and have unsettled your minds, without having received any such instructions from us;
1 Corinthians 9:20-21
To the Jews I have become like a Jew in order to win Jews; to men under the Law as if I were under the Law--although I am not--in order to win those who are under the Law;
2 Corinthians 2:13
yet, obtaining no relief for my spirit because I did not find our brother Titus, I bade them farewell and went on into Macedonia.
Galatians 5:2-6
Remember that it is I Paul who tell you that if you receive circumcision Christ will avail you nothing.