1 Corinthians 7:18-20

18 being circumcised — was any one called? let him not become uncircumcised; in uncircumcision was any one called? let him not be circumcised;

19 the circumcision is nothing, and the uncircumcision is nothing — but a keeping of the commands of God.

20 Each in the calling in which he was called — in this let him remain;