Kumbukumbu la Torati 21 : 17 Deuteronomy chapter 21 verse 17

lakini amkubali mzaliwa wa kwanza mwana wa yule asiyempenda, kwa kumpa mafungu mawili katika vyote alivyo navyo; kwa maana ndiye mwanzo wa nguvu zake; haki ya mzaliwa wa kwanza ni yake yeye.
soma Mlango wa 21

but he shall acknowledge the firstborn, the son of the hated, by giving him a double portion of all that he has; for he is the beginning of his strength; the right of the firstborn is his.