'Of the Circumcision' in the Bible

But on the contrary, when they saw that I was intrusted with the gospel of the uncircumcision, as Peter with that of the circumcision:

(For he that wrought effectually in Peter to the apostleship of the circumcision, wrought likewise effectually in me toward the Gentiles:

For before certain men came from James, he ate with the Gentiles; but when they were come, he withdrew and separated himself, fearing those of the circumcision.