Galatians 2:3

2:3 Yet not even Titus, who was with me, was compelled to be circumcised, although he was a Greek.

Galatians 2:14

2:14 But when I saw that they were not behaving consistently with the truth of the gospel, I said to Cephas in front of them all, “If you, although you are a Jew, live like a Gentile and not like a Jew, how can you try to force the Gentiles to live like Jews?”

Acts 15:1

The Jerusalem Council

15:1 Now some men came down from Judea and began to teach the brothers, “Unless you are circumcised according to the custom of Moses, you cannot be saved.”

Acts 15:5

15:5 But some from the religious party of the Pharisees who had believed stood up and said, “It is necessary to circumcise the Gentiles and to order them to observe the law of Moses.”