Galatians 2:1-5

Then after a period of fourteen years I again went up to Jerusalem, [this time] with Barnabas, taking Titus along also. I went up [to Jerusalem] because of a [divine] revelation, and I put before them the gospel which I preach among the Gentiles. But I did so in private before those of reputation, for fear that I might be running or had run [the course of my ministry] in vain. But [all went well, for] not even Titus, who was with me, was compelled [as some had anticipated] to be circumcised, despite the fact that he was a Greek. My concern was because of the false brothers [those people masquerading as Christians] who had been secretly smuggled in [to the community of believers]. They had slipped in to spy on the freedom which we have in Christ Jesus, in order to bring us back into bondage [under the Law of Moses]. But we did not yield to them even for a moment, so that the truth of the gospel would continue to remain with you [in its purity].