Galatians 2:3-5; Galatians 2:11-12

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

4 This matter arose because some false believers had infiltrated our ranks to spy on the freedom we have in Christ Jesus and to make us slaves.

5 We did not give in to them for a moment, so that the truth of the gospel might be preserved for you.

11 When Cephas came to Antioch, I opposed him to his face, because he stood condemned.

12 For before certain men came from James, he used to eat with the Gentiles. But when they arrived, he began to draw back and separate himself from the Gentiles because he was afraid of those who belonged to the circumcision group.