Galatians 2:1-5

Paul and the Other Apostles
Then after fourteen years I went up again to Jerusalem with Barnabas, taking Titus along with me. I went up in response to a revelation. Then I laid before them (though only in a private meeting with the acknowledged leaders) the gospel that I proclaim among the Gentiles, in order to make sure that I was not running, or had not run, in vain. But even Titus, who was with me, was not compelled to be circumcised, though he was a Greek. But because of false believers secretly brought in, who slipped in to spy on the freedom we have in Christ Jesus, so that they might enslave us— we did not submit to them even for a moment, so that the truth of the gospel might always remain with you.