Cross reference
Mark 10:12
12 And if she herself puts away her husband and takes another, she is false to her husband.
1 Corinthians 7:11
11 (Or if she goes away from him, let her keep unmarried, or be united to her husband again); and that the husband may not go away from his wife.
1 Corinthians 7:13
13 And if a woman has a husband who is not a Christian, and it is his desire to go on living with her, let her not go away from her husband.