1 Corinthians 7:11-13

11 But if she does, she must remain unmarried or else be reconciled to her husband. And a husband must not divorce his wife.

12 To the rest I say this (I, not the Lord): If a brother has an unbelieving wife and she is willing to live with him, he must not divorce her.

13 And if a woman has an unbelieving husband and he is willing to live with her, she must not divorce him.