Galatians 2:2-5

And I went up by revelation; and I laid before them the gospel which I preach among the Gentiles but privately before them who were of repute, lest by any means I should be running, or had run, in vain. But not even Titus who was with me, being a Greek, was compelled to be circumcised: and that because of the false brethren privily brought in, who came in privily to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage: to whom we gave place in the way of subjection, no, not for an hour; that the truth of the gospel might continue with you.