Romans 2:25

For circumcision benefits you if you observe the law, but if you are a lawbreaker, your circumcision has become uncircumcision.

Jeremiah 4:4

Circumcise yourselves to the Lord;
remove the foreskin of your hearts,
men of Judah and residents of Jerusalem.
Otherwise, My wrath will break out like fire
and burn with no one to extinguish it
because of your evil deeds.

Deuteronomy 30:6

The Lord your God will circumcise your heart and the hearts of your descendants, and you will love Him with all your heart and all your soul so that you will live.

Jeremiah 9:25-26

“The days are coming”—the Lord’s declaration—“when I will punish all the circumcised yet uncircumcised:

Acts 7:51

“You stiff-necked people with uncircumcised hearts and ears! You are always resisting the Holy Spirit; as your ancestors did, so do you.

Romans 2:23

You who boast in the law, do you dishonor God by breaking the law?

Romans 2:28-2

For a person is not a Jew who is one outwardly, and true circumcision is not something visible in the flesh.

Romans 4:11-12

And he received the sign of circumcision as a seal of the righteousness that he had by faith while still uncircumcised. This was to make him the father of all who believe but are not circumcised, so that righteousness may be credited to them also.

Galatians 5:3-6

Again I testify to every man who gets himself circumcised that he is obligated to keep the entire law.

Galatians 6:15

For both circumcision and uncircumcision mean nothing; what matters instead is a new creation.

Ephesians 2:11-12

So then, remember that at one time you were Gentiles in the flesh—called “the uncircumcised” by those called “the circumcised,” which is done in the flesh by human hands.

Treasury of Scripture Knowledge

Summary

For circumcision verily profiteth, if thou keep the law: but if thou be a breaker of the law, thy circumcision is made uncircumcision.

Bible References

But if

Romans 2:23
You who boast in the law, do you dishonor God by breaking the law?
Jeremiah 9:25
“The days are coming”—the Lord’s declaration—“when I will punish all the circumcised yet uncircumcised:
Acts 7:51
“You stiff-necked people with uncircumcised hearts and ears! You are always resisting the Holy Spirit; as your ancestors did, so do you.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.