5:1 It is actually reported that sexual immorality exists among you, the kind of immorality that is not permitted even among the Gentiles, so that someone is cohabiting with his father’s wife.
7:12 To the rest I say – I, not the Lord – if a brother has a wife who is not a believer and she is happy to live with him, he should not divorce her.
7:39 A wife is bound as long as her husband is living. But if her husband dies, she is free to marry anyone she wishes (only someone in the Lord).