Deuteronomy 21:17
17Instead, he must acknowledge the firstborn, the son of his unloved wife, by giving him a double portion of all that he has. For [that son] is the firstfruits of his [father’s] strength; the right of the firstborn belongs to him.
17Instead, he must acknowledge the firstborn, the son of his unloved wife, by giving him a double portion of all that he has. For [that son] is the firstfruits of his [father’s] strength; the right of the firstborn belongs to him.