Deuteronomy 21:14 in the King James Version
And it shall be, if thou have no delight in her, then thou shalt let her go whither she will; but thou shalt not sell her at all for money, thou shalt not make merchandise of her, because thou hast humbled her.
Context
13 She shall take off the clothing of her captivity, and shall remain in your house, and bewail her father and her mother a full month. After that you shall go in to her and be her husband, and she shall be your wife.
14 It shall be, if you have no delight in her, then you shall let her go where she desires; but you shall not sell her at all for money. You shall not deal with her as a slave, because you have humbled her.
15 If a man has two wives, the one beloved and the other hated, and they have borne him children, both the beloved and the hated, and if the firstborn son is hers who was hated,