Galatians 2:3
But not even Titus, who was with me, though he was a Greek, was compelled to be circumcised.
Acts 16:3
This man Paul wished to go with him: and he took him and circumcised him, on account of the Jews that were in those places: for they all knew that his father was a Greek.
Acts 15:24
Inasmuch as we have heard that certain persons went out from us and troubled you with words, subverting your souls, saying, That you must be circumcised, and keep the law, to whom we gave no commandment,
1 Corinthians 9:20-21
And to the Jews, I became as a Jew, that I might gain the Jews: to those who are under law, as under law, (not being myself under law,) that I might gain those who are under law;
2 Corinthians 2:13
I had no rest in. my spirit, because I did not find Titus my brother; but I took leave of them, and went into Macedonia.
Galatians 5:2-6
Behold, I Paul say to you, that if you be circumcised, Christ will profit you nothing.