Galatians 5:2-3

Mark my words! I, Paul, tell you that if you let yourselves be circumcised, Christ will be of no value to you at all. Again I declare to every man who lets himself be circumcised that he is obligated to obey the whole law.

I, Paul, tell you that if you let yourselves be circumcised, Christ will be of no value to you at all 
Galatians 5:6  For in Christ Jesus neither circumcision nor uncircumcision has any value. The only thing that counts is faith expressing itself through love. 
Galatians 5:11-12  Brothers and sisters, if I am still preaching circumcision, why am I still being persecuted? In that case the offense of the cross has been abolished. As for those agitators, I wish they would go the whole way and emasculate themselves!
Acts 15:1  Certain people came down from Judea to Antioch and were teaching the believers: "Unless you are circumcised, according to the custom taught by Moses, you cannot be saved."

Again I declare to every man who lets himself be circumcised that he is obligated to obey the whole law 
Romans 2:25  Circumcision has value if you observe the law, but if you break the law, you have become as though you had not been circumcised.
Galatians 3:10  For all who rely on the works of the law are under a curse, as it is written: "Cursed is everyone who does not continue to do everything written in the Book of the Law." (Deuteronomy 27:26)
James 2:10  For whoever keeps the whole law and yet stumbles at just one point is guilty of breaking all of it.

(parentheses are mine)

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