Deuteronomy 21:17 Cross References - ECB

¹⁷ but he recognizes the son of the hated as the firstbirth, by giving him a twofold mouth of all they find with him: for he is the beginning of his strength; the judgment of firstrights is his.

⁵ And Abraham gives all he has to Yischaq. ⁶ And to the sons of the concubines Abraham has, Abraham gives gifts and sends them away from Yischaq his son while he yet lives eastward, to the east country.
DEATH OF ABRAHAM

³¹ And Yaaqov says, Sell me this day your firstrights. ³² And Esav says, Behold, I am going to die: and what profit is this firstrights to me? ³³ And Yaaqov says, Oath to me this day. - and he oaths to him and he sells his firstrights to Yaaqov: ³⁴ and Yaaqov gives Esav bread and pottage of lentiles; and he eats and drinks and rises and goes his way: thus Esav despises his firstrights.

³ Reu Ben, my firstbirth: you - my force and the beginning of my strength; the remainder of exaltation and the remainder of strength:

¹
GENEALOGY OF THE SONS OF REU BEN
As to the sons of Reu Ben the firstbirthed of Yisra El: - for he is the firstbirthed; and because he profaned the chamber of his father his firstrights are given to the sons of Yoseph the son of Yisra El; and the genealogy is not genealogized after the firstrights; ² for Yah Hudah prevails mightily above his brothers and of him the eminence; and the firstrights are to Yoseph.

³⁶ he smote all the firstbirthed in their land - the firstfruits of all their strength: