Romans 2:25-28

The Jewish ceremony of circumcision has value only if you obey God’s law. But if you don’t obey God’s law, you are no better off than an uncircumcised Gentile. And if the Gentiles obey God’s law, won’t God declare them to be his own people? In fact, uncircumcised Gentiles who keep God’s law will condemn you Jews who are circumcised and possess God’s law but don’t obey it. For you are not a true Jew just because you were born of Jewish parents or because you have gone through the ceremony of circumcision.