Romans 2:25-29 - Circumcision Of The Heart
25 For circumcision verily profits if thou keep the law, but if thou art a rebel to the law, thy circumcision is made into a foreskin. 26 Therefore if the uncircumcised keep the righteousness of the law, shall not his foreskin be counted for circumcision? 27 And that which is by nature foreskin, but keeps the law perfectly, shall judge thee who with the letter and with the circumcision art rebellious to the law. 28 For he is not a Jew who is one outwardly, neither is circumcision that which is done outwardly in the flesh; 29 but he is a Jew who is one inwardly, and circumcision is that of the heart, in the spirit and not in the letter, whose praise is not of men, but of God.