Deuteronomy 21:13-15 Holman Christian Standard Bible (HCSB)

13. remove the clothes she was wearing when she was taken prisoner, live in your house, and mourn for her father and mother a full month. After that, you may have sexual relations with her and be her husband, and she will be your wife.

14. Then if you are not satisfied with her, you are to let her go where she wants, but you must not sell her for money or treat her as merchandise, because you have humiliated her.

15. “If a man has two wives, one loved and the other unloved, and both the loved and the unloved bear him sons, and if the unloved wife has the firstborn son,

Deuteronomy 21