1 Corinthians 7:10-12

And to those who are married, I give this charge—which is not mine, but the Lord’s —that the wife should not depart from her husband. But if she does, then she should either remain unmarried or reconcile with her husband. And a husband must not divorce his wife. To the rest I say, which is not a saying of the Lord, if a brother has an unbelieving wife and she is content to live with him, he should not divorce her.