Romans 2:25-27

Circumcision [the sign of the covenant of Abraham] is indeed of value if you practice the Law; but if you habitually break the Law, your circumcision has become uncircumcision [it is meaningless in God’s sight]. So if the uncircumcised man keeps the requirements of the Law, will not his uncircumcision be regarded [by God] as circumcision? Then he who is physically uncircumcised but keeps [the spirit of] the Law will judge you who, even though you have the written code and circumcision, break the Law.