Romans 2:29

but he is a Jew, who is one inwardly; and circumcision is that of the heart, in spirit, not in letter, whose praise is not of men, but of God.

Romans 4:11

And he received the sign of circumcision, a seal of the righteousness of the faith which he had while in uncircumcision; that he might be father of all who believe while in uncircumcision, that the righteousness might be reckoned to them;

Colossians 2:11

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

Treasury of Scripture Knowledge

Summary

At that time the LORD said unto Joshua, Make thee sharp knives, and circumcise again the children of Israel the second time.

Bible References

Circumcise

Romans 2:29
but he is a Jew, who is one inwardly; and circumcision is that of the heart, in spirit, not in letter, whose praise is not of men, but of God.
Romans 4:11
And he received the sign of circumcision, a seal of the righteousness of the faith which he had while in uncircumcision; that he might be father of all who believe while in uncircumcision, that the righteousness might be reckoned to them;
Colossians 2:11
in Whom ye were also circumcised with a circumcision not made with hand, in the putting off of the body of the flesh, in the circumcision of Christ;