1 Corinthians 7:12–14

12 But I (not the Lord) say to the rest: If any brothere has an unbelieving wife and she is willing to live with him, he must not divorce her. 13 Also, if any woman has an unbelieving husband and he is willing to live with her, she must not divorce her husband. 14 For the unbelieving husband is made holyf by the wife, and the unbelieving wife is made holy by the husband.B Otherwise your children would be unclean, but as it is they are holy.