Deuteronomy 21 The right of the firstborn

Deuteronomy 21
The right of the firstborn
15 When a man has two wives, one he loves and one he hates, and the beloved and the bored give birth to him, and the firstborn is bored,
16 For in the day that he shall inherit what he hath from his children, he shall not be able to give the birthright to the son of his beloved, before the son of the bored, who is the firstborn.
17 But he shall acknowledge to the son of the bored, by his firstborn, giving him a double portion of all that he hath: for that is the beginning of his strength; your birthright is yours.