Deuteronomy 21:10-13

10“When you go out to battle against your enemies, and 1the Lord your God delivers them into your hands and you take them away captive,

11and see among the captives a beautiful woman, and have a desire for her and would take her as a wife for yourself,

12then you shall bring her home to your house, and she shall 2shave her head and 3trim her nails.

13She shall also 4remove the clothes of her captivity and shall remain in your house, and 5mourn 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.