'Birthright' in the Bible

The sons of Reuben the firstborn of Israel (for he was the firstborn, but when he defiled the couch of his father, his birthright was given to the sons of Joseph, the son of Israel, so that he was not enrolled in the genealogy as the firstborn,

though Judah became strong among his brothers and a chief [came] from him, but the birthright belonged to Joseph).