Galatians 1:22; Galatians 2:6; Galatians 2:11

22 I was still unknown by sight to the churches of Judea which were in Christ;
6 But from those who were of high reputation (what they were makes no difference to me; God shows no partiality )-well, those who were of reputation contributed nothing to me.
11 But when Cephas came to Antioch, I opposed him to his face, because he stood condemned.