Kumbukumbu La Torati 21:17

Ni lazima amkubali mwana wa mke asiyempenda kama mzaliwa wa kwanza kwa kumpa sehemu ya vile vyote alivyo navyo maradufu. Mwana huyo ni ishara ya kwanza ya nguvu za baba yake. Haki ya mzaliwa wa kwanza ni yake yeye.

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