Deuteronomy 21:15-17

Common English Bible

Right of the oldest son

¹⁵ Now suppose a man has two wives—one of them loved and the other unloved. Both wives bear children, but the oldest male is the unloved wife’s child. ¹⁶ On the day when the man decides what will go to each of his children as an inheritance, he isn’t allowed to treat his loved wife’s son as the oldest male rather than his unloved wife’s son, who is the real oldest male. ¹⁷ Instead, he must acknowledge the unloved wife’s son as the oldest male, giving to him two-thirds of everything that he owns, because that son is the earliest produce of his physical power. The oldest male’s rights belong to that son.