'Of the Circumcision' in the Bible

but contrariwise, when they saw that I had been intrusted with the gospel of the uncircumcision, even as Peter with the gospel of the circumcision

(for he that wrought for Peter unto the apostleship of the circumcision wrought for me also unto the Gentiles);

For before that certain came from James, he ate with the Gentiles; but when they came, he drew back and separated himself, fearing them that were of the circumcision.