Romans 2:25

For circumcision truly profits if you keep the Law, but if you are a transgressor of the Law, circumcision becomes uncircumcision.

Jeremiah 4:4

Circumcise yourselves to Jehovah, and take away the foreskins of your heart, men of Judah and people of Jerusalem; lest My fury come forth like fire, and burn so that none can put it out; because of the evil of your doings.

Deuteronomy 30:6

And Jehovah your God will circumcise your heart and the heart of your seed, to love Jehovah your God with all your heart and with all your soul, so that you may live.

Jeremiah 9:25-26

Behold, the days come, says Jehovah, that I will punish all the circumcised with the uncircumcised;

Acts 7:51

O stiff-necked and uncircumcised in heart and ears! You always resist the Holy Spirit. As your fathers did, so you do.

Romans 2:23

You who boast in Law, do you dishonor God through breaking the Law?

Romans 2:28-2

For he is not a Jew who is one outwardly, nor is circumcision that outwardly in flesh;

Romans 4:11-12

And he received a sign of circumcision, a seal of the righteousness of the faith while still uncircumcised; so that he might be the father of all those believing through uncircumcision, for righteousness to be imputed to them also;

Galatians 5:3-6

For I testify again to every man that is circumcised, that he is a debtor to do all the Law,

Galatians 6:15

For in Christ Jesus neither circumcision has any strength, nor uncircumcision, but a new creation.

Ephesians 2:11-12

Therefore remember that you, the nations, in time past were in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by 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 Law, do you dishonor God through breaking the Law?
Jeremiah 9:25
Behold, the days come, says Jehovah, that I will punish all the circumcised with the uncircumcised;
Acts 7:51
O stiff-necked and uncircumcised in heart and ears! You always resist the Holy Spirit. As your fathers did, so you do.