1 Corinthians 7:10-12
New International Reader's Version
10 I give a command to those who are married. It is a direct command from the Lord, not from me. A wife must not leave her husband. 11 But if she does, she must not get married again. Or she can go back to her husband. And a husband must not divorce his wife.
12 I also have something to say to everyone else. It is from me, not a direct command from the Lord. Suppose a brother has a wife who is not a believer. If she is willing to live with him, he must not divorce her.Read full chapter