'Of the Circumcision' in the Bible

For before the coming of certain people from James, he was in the habit of eating with heathen Christians, but after they came, he began to draw back and hold aloof from them, because he was afraid of the circumcision party.

For there are many insubordinate people, mere talkers with nothing to say, but deceivers of their own minds, especially those of the circumcision party,