1 Corinthians 7:12-14

12 To the rest I say — I, not the Lord: if any brother has a wife who is not a believer, and she is satisfied to go on living with him, he should not leave her.

13 Also, if any woman has an unbelieving husband who is satisfied to go on living with her, she is not to leave him.

14 For the unbelieving husband has been set aside for God by the wife, and the unbelieving wife has been set aside for God by the brother — otherwise your children would be “unclean,” but as it is, they are set aside for God.