GalatiansChapter 2

Then after fourteen years I went up again to Jerusalem with Barnabas, taking Titus along as well.
I went up in response to a revelation, and I laid before them the gospel I proclaim among the Gentiles — privately, though, before those held in esteem — to make sure I was not running, or had not run, in vain.
Yet not even Titus, who was with me, was compelled to be circumcised, Greek though he was.
This came up because of the false brothers who had been smuggled in — men who slipped in to spy on the freedom we have in Christ Jesus, so that they might make us slaves.
To them we did not yield in submission even for a moment, so that the truth of the gospel might remain with you.
And from those reputed to be something — what they once were makes no difference to me; God shows no partiality — those of repute added nothing to me.
On the contrary, they saw that I had been entrusted with the gospel for the uncircumcised, just as Peter had been for the circumcised.
For the one who worked through Peter in his mission to the circumcised worked also through me for the Gentiles.
And recognizing the grace given to me, James, Cephas, and John, reputed to be pillars, gave the right hand of fellowship to me and Barnabas, agreeing that we should go to the Gentiles and they to the circumcised.
They asked only that we remember the poor — the very thing I was eager to do.
But when Cephas came to Antioch, I opposed him to his face, because he stood condemned.
For before certain men came from James, he used to eat with the Gentiles; but when they came, he drew back and separated himself, fearing those of the circumcision.
And the rest of the Jews joined him in this hypocrisy, so that even Barnabas was carried away by their pretense.
But when I saw that they were not walking straight toward the truth of the gospel, I said to Cephas in front of them all: "If you, a Jew, live like a Gentile and not like a Jew, how can you compel the Gentiles to live like Jews?"
We are Jews by birth and not Gentile sinners,
yet we know that a person is not justified by works of the law but through faith in Jesus Christ. So we too have believed in Christ Jesus, in order to be justified by faith in Christ and not by works of the law, because by works of the law no human being will be justified.
But if, in seeking to be justified in Christ, we ourselves have been found to be sinners, does that make Christ a servant of sin? Absolutely not!
For if I rebuild what I tore down, I prove myself a transgressor.
For through the law I died to the law, so that I might live to God. I have been crucified with Christ.
It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh, I live by faith in the Son of God, who loved me and gave himself for me.
I do not set aside the grace of God; for if righteousness comes through the law, then Christ died for nothing.