Romans 2:27-31

And shall not uncircumcision which is by nature, if it fulfil the law, judge thee, who by the letter and circumcision dost transgress the law?

For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh:

But 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.