1 Corinthians 7:8-12

But I say to the unmarried and to widows that it is good for them if they remain even as I.

But if they do not have self-control, let them marry; for it is better to marry than to burn with passion.

But to the married I give instructions, not I, but the Lord, that the wife is not to leave her husband

(but if she does leave, she must remain unmarried, or else be reconciled to her husband), and that the husband is not to divorce his wife.

But to the rest I say, not the Lord, that if any brother has an unbelieving wife, and she consents to live with him, he must not divorce her.