All these are the twelve tribes of Israel (the underlying thought is that in blessing his sons Jacob was really blessing the future tribes): and this is it that their father spake unto them, and blessed them; every one according to his blessing he blessed them (i.e. every one received his own appropriate benediction).
And he charged them, and said unto them, I am to be gathered unto my people (vide on Genesis 15:15): bury me with my fathers—thus laying on them the injunction he had previously, with the super-added solemnity of an oath, laid on Joseph (Genesis 47:29-31)—in the cave that is in the field of Ephron the Hittite, in the cave that is in the field of Machpelah, which is before Mature, in the land of Canaan, which Abraham bought with the field of Ephron the Hittite for a possession of a burying-place (vide Genesis 23:16-20). Jacob had learnt from his father and had carefully preserved all the details relating to the purchase of their family sepulcher. There they buried Abraham and Sarah his wife; there they buried Isaac and Rebekah his wife; and there I buried Leah. From this it would appear that Leah had not descended into Egypt.