Deuteronomy 21:12-14

12then you shall bring her home to your house, and she shall 1shave her head and 2trim her nails. 13She shall also 3remove the clothes of her captivity and shall remain in your house, and 4mourn her father and mother a full month; and after that you may go in to her and be her husband and she shall be your wife. 14It shall be, if you are not pleased with her, then you shall let her go 5wherever she wishes; but you shall certainly not sell her for money, you shall not 6mistreat her, because you have 7humbled her.