Deuteronomy 21:13-15

Modern English Version

¹³ She must also discard the clothing of her captivity and shall remain in your house, and mourn her father and her mother for a full month. After that you may have relations with her, and be her husband, and she will be your wife. ¹⁴ It will be, if you are not pleased with her, then you must let her go wherever she pleases, but you may not sell her at all for money, nor are you to make merchandise of her, because you have humbled her.

The Right of the Firstborn

¹⁵ If a man has two wives, one beloved and another unloved, and both have borne him children, both the loved one and the unloved one, and if the firstborn son is hers that is unloved,