Galatians 2:9-11 New Revised Standard Version Catholic Edition (NRSVCE)
9 and when James and Cephas and John, who were acknowledged pillars, recognized the grace that had been given to me, they gave to Barnabas and me the right hand of fellowship, agreeing that we should go to the Gentiles and they to the circumcised. 10 They asked only one thing, that we remember the poor, which was actually what I was[a] eager to do.
Paul Rebukes Peter at Antioch
11 But when Cephas came to Antioch, I opposed him to his face, because he stood self-condemned;