Galatians 2:11-14 (New International Version)

Paul Opposes Peter

 ¹¹When Peter came to Antioch, I opposed him to his face, because he was clearly in the wrong. ¹²Before 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. ¹³The other Jews joined him in his hypocrisy, so that by their hypocrisy even Barnabas was led astray.

 ¹⁴When I saw that they were not acting in line with the truth of the gospel, I said to Peter in front of them all, "You are a Jew, yet you live like a Gentile and not like a Jew. How is it, then, that you force Gentiles to follow Jewish customs?