Bible: 1 Corinthians 7:10-14
7:10 To the married I give this command – not I, but the Lord 1 – a wife should not divorce a husband 7:11 (but if she does, let her remain unmarried, or be reconciled to her husband), and a husband should not divorce his wife.
7:12 To the rest I say – I, not the Lord 2 – if a brother has a wife who is not a believer and she is happy to live with him, he should not divorce her. 7:13 And if a woman has a husband who is not a believer and he is happy to live with her, she should not divorce him. 7:14 For the unbelieving husband is sanctified because of the wife, and the unbelieving wife because of her husband. 3 Otherwise your children are unclean, but now they are holy.