Deuteronomy 21:14-16

Living Bible

¹⁴ However, if after marrying her you decide you don’t like her, you must let her go free—you may not sell her or treat her as a slave, for you have humiliated her.

¹⁵ “If a man has two wives but loves one and not the other, and both have borne him children, and the mother of his oldest son is the wife he doesn’t love, ¹⁶ he may not give a larger inheritance to his younger son, the son of the wife he loves.