'Circumcision' in the Bible

in whom ye were also circumcised with a circumcision not made with hands, in the putting off of the body of the flesh, in the circumcision of Christ;

where there cannot be Greek and Jew, circumcision and uncircumcision, barbarian, Scythian, bondman, freeman; but Christ is all, and in all.

and Jesus that is called Justus, who are of the circumcision: these only are my fellow-workers unto the kingdom of God, men that have been a comfort unto me.