Romans 2:29
but it is the Jew, who is so inwardly, and it is the circumcision of the heart, according to the spiritual, not the literal sense, which have the approbation, I do not say of men, but of God.
Romans 4:11
and he received the sign of circumcision, as a seal of the justification by that faith, which the uncircumcised have: that he might be the father of all those who believe, tho' they are uncircumcised, that it might be accounted to them also for righteousness:
Colossians 2:11
by whom also ye have obtain'd the true spiritual circumcision, not effected by men, when you were by a christian circumcision divested of all your carnal affections,