Deuteronomy 21:11-13

Amplified Bible

¹¹ and you see a beautiful woman among the captives, and desire her and would take her as your wife, ¹² then you shall bring her [home] to your house, and she shall shave her head and trim her nails [in preparation for mourning]. ¹³ She shall take off the clothes of her captivity and remain in your house, and weep (mourn) for her father and her mother a full month. After that you may go in to her and be her husband and she shall be your wife.