'Of the Circumcision' in the Bible

But, quite the opposite, when they saw that I had been made responsible for preaching the good news to those without circumcision, even as Peter had been for those of the circumcision

(Because he who was working in Peter as the Apostle of the circumcision was working no less in me among the Gentiles);

For before certain men came from James, he did take food with the Gentiles: but when they came, he went back and made himself separate, fearing those who were of the circumcision.