1 Corinthians 5:1
Church Discipline
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.
1 Corinthians 7:16
7:16 For how do you know, wife, whether you will bring your husband to salvation?
Or how do you know, husband, whether you will bring your wife to salvation?
1 Corinthians 9:5
9:5 Do we not have the right to the company of a believing wife, like the other apostles and the Lord’s brothers and Cephas?