Romans

²⁴For the name of God is blasphemed among the Gentiles because of you, even as it is written. ²⁵For circumcision indeed profiteth, if thou be a doer of the law: but if thou be a transgressor of the law, thy circumcision is become uncircumcision. ²⁶If therefore the uncircumcision keep the ordinances of the law, shall not his uncircumcision be reckoned for circumcision? ²⁷and shall not the uncircumcision which is by nature, if it fulfill the law, judge thee, who with the letter and circumcision art a transgressor of the law? ²⁸For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh: ²⁹but he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, not in the letter; whose praise is not of men, but of God.