Deuteronomy 21:10-14

“When you go out to battle against your enemies, and the LORD your God delivers them into your hands and you take them away captive, and see among the captives a beautiful woman, and have a desire for her and would take her as a wife for yourself, then you shall bring her home to your house, and she shall shave her head and trim her nails. She shall also remove the clothes of her captivity and shall remain in your house, and mourn 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. It shall be, if you are not pleased with her, then you shall let her go wherever she wishes; but you shall certainly not sell her for money, you shall not mistreat her, because you have humbled her.