1 Corinthians 7:9-11

9 But if they do not have [sufficient] self-control, they should marry; for it is better to marry than to burn with passion.

10 But to the[2] married [believers] I give instructions—not I, but the Lord—that the wife is not to separate from her husband,

11 (but even if she does leave him, let her remain single or else be[3] reconciled to her husband) and that the husband should not leave his wife.