1 Corinthians 7:18-20

18Was any man called when he was already circumcised? He is not to become uncircumcised. Has anyone been called in uncircumcision? 1He is not to be circumcised. 192Circumcision is nothing, and uncircumcision is nothing, but what matters is 3the keeping of the commandments of God. 204Each person is to remain in that 5state in which he was called.