Romans 2.28-3.18
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, and not in the letter; whose praise is not of men, but of God. 1What advantage then hath the Jew? or what profit is there of circumcision? 2Much every way: chiefly, because that unto them were committed the oracles of God. 3For what if some did not believe? shall their unbelief make the faith of God without effect? 4God forbid: yea, let God be true, but every man a liar; as it is written, That thou mightest be justified in thy sayings, and mightest overcome when thou art judged.