Romans 2:28-29

28For you are not a true Jew just because you were born of Jewish parents or because you have gone through the ceremony of circumcision.

29No, a true Jew is one whose heart is right with God. And true circumcision is not merely obeying the letter of the law; rather, it is a change of heart produced by the Spirit. And a person with a changed heart seeks praise from God, not from people.