1 Corinthians 7:15-20

15But if the unbeliever go away, let them go away; a brother or a sister is not bound in such [cases], but 1God has called us in peace.

16For what knowest thou, O wife, if thou shalt save thy husband? or what knowest thou, O husband, if thou shalt save thy wife?

17However, as the Lord has divided to each, as 2God has called each, so let him walk; and thus I ordain in all the assemblies.

18Has any one been called circumcised? let him not become uncircumcised: has any one been called in uncircumcision? let him not be circumcised.

19Circumcision is nothing, and uncircumcision is nothing; but keeping 3God's commandments.

20Let each abide in that calling in which he has been called.