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.
16
when he wills his property to his sons, he must not give the rights of the firstborn to the son of the wife he loves in preference to his actual firstborn, the son of the wife he does not love.