Bible: 1 Cor 7:12-14
7:12 To the rest I say – I, not the Lord 1 – 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. 2 Otherwise your children are unclean, but now they are holy.