Romans 2:25

Circumcision indeed is an advantage, if you keep the law: but if you violate the law, your being a Jew makes you no better than a heathen.

Acts 7:51

stubborn people, whose hearts and ears like the uncircumcised, are always averse to the holy spirit: as your fathers did, so do ye.

Romans 2:23

and you, who glory in the law, do you dishonour God by the violation of the law?

Romans 2:28-2

for it is not the Jew in outward appearance, neither is it the external mark of circumcision:

Romans 4:11-12

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:

Galatians 5:3-6

for I testify to every man that is circumcised, that he is under an obligation to perform the whole law.

Galatians 6:15

for in the dispensation of Jesus Christ, neither circumcision availeth any thing, nor uncircumcision, but the new creation.

Ephesians 2:11-12

Wherefore remember that you were heretofore Gentiles, being denominated the uncircumcised, by those who are the circumcised by a manual operation;

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
and you, who glory in the law, do you dishonour God by the violation of the law?
Acts 7:51
stubborn people, whose hearts and ears like the uncircumcised, are always averse to the holy spirit: as your fathers did, so do ye.