Deuteronomy 21:12

9 Thou, therefore shalt consume the guilt of shedding innocent blood out of thy midst,—when thou shalt do that which is right in the eyes of Yahweh.

10 When thou shalt go forth to war against thine enemies,—and Yahweh thy God shall deliver them into thy hand and thou shalt take them captive;

11 and shalt see among the captives a woman of beautiful figure,—and shalt have a desire unto her, and wouldest take her to thee to wife,

12 then shalt thou bring her into the midst of thy house,—and she shall shave her head and pare her nails;

13 and put away the raiment of her captivity from off her, and shall remain in thy house, and bewail her father and her mother for the space of a month,—and after that, mayest thou go in unto her, and be her husband, and she shall be thy wife.

14 And it shall be, if thou hast no pleasure in her, then shalt thou let her go whither she will but thou shalt not sell, her for silver,—thou shalt not make merchandise of her, because thou hast humbled her.

15 When a man shall have two wives—the one beloved and, the other hated, and they have borne him sons, both she that is beloved, and she that is hated,—and it shall be that the firstborn son belongeth to her that is hated,