1 Corinthians 7

12 And to the rest I speak—not the LORD—if any brother has an unbelieving wife, and she is pleased to dwell with him, do not let him send her away; 13 and a woman who has an unbelieving husband, and he is pleased to dwell with her, do not let her send him away; 14 for the unbelieving husband has been sanctified in the wife, and the unbelieving wife has been sanctified in the husband; otherwise your children are unclean, but now they are holy.