Romans 2:27-28

²⁷Indeed, the person who, owing to his birth, remains uncircumcised, and yet scrupulously obeys the Law, will condemn you, who, for all your written Law and your circumcision, are yet a breaker of the Law.

²⁸For a man who is only a Jew outwardly is not a real Jew; nor is outward bodily circumcision real circumcision. The real Jew is the person who is a Jew in soul;