Comentários de Citação sobre Gênesis 49:31

הבכור כבכורתו, “the firstborn according to the mother he was the firstborn of.” Rashi explains: when it came to seating Binyamin, seeing that he did no longer have a mother, he seated him according to his being the youngest as the brothers had told him on their first visit. Joseph thought that the mothers of the others were still alive, [although we know from Yaakov’s remarks on his deathbed that Leah had already been buried by him in the cave of Machpelah (Genesis 49,31). The brothers who were not firstborns seated themselves in the order of their seniority, seeing that it does not say concerning them that ויושיב אותם, “he seated them.”. Ed.]

A Midrashic approach (found in Vayikra Rabbah 36,4): when mentioning the memory of Avraham and Yitzchak the Torah adds the word אף to signify that both these patriarchs had also sired and raised an Ishmael and Esau respectively, thus causing G’d to become angry; in connection with Yaaov that word is missing seeing all his children remained true to their father’s teaching, to Torah-values.
The Torah has listed the merits of the patriarchs. How do we know that G’d will also invoke the merits of the four matriarchs? These are alluded to by the extra word את before mention of the word בריתי, “My covenant.” The word את describing the matriarchs is not unique in our verse. We find this word as referring to three of the matriarchs when Yaakov tells his sons that these three matriarchs had been buried either by him or his forefather in the cave of Machpelah (compare Genesis 47,31). This is also confirmed by Sifra Bechukotai 8,8.