Cross reference
Mark 10:12
12 If a woman herself divorces her husband, and marries another, she commits adultery."
1 Corinthians 7:11
11 (but if she departs, let her remain unmarried, or else be reconciled to her husband), and that the husband not leave his wife.
1 Corinthians 7:13
13 The woman who has an unbelieving husband, and he is content to live with her, let her not leave her husband.