Galatians 2:1-4

Then after an interval of fourteen years I went up again to Jerusalem with Barnabas, taking Titus along also.

It was because of a revelation that I went up; and I submitted to them the gospel which I preach among the Gentiles, but I did so in private to those who were of reputation, for fear that somehow I might be running, or had run, in vain.

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

Yet it was a concern because of the false brothers secretly brought in, who had sneaked in to spy on our freedom which we have in Christ Jesus, in order to enslave us.