Genesis 49:28

Here is, I. The summing up of the blessings of Jacob's sons, Gen 49:28. Though Reuben, Simeon, and Levi were put under the marks of their father's displeasure, yet he is said to bless them every one according to his blessing; for none of them were rejected as Esau was. Note, Whatever rebukes of God's word or providence we are under at any time, yet, as long as we have an interest in God's covenant, a place and a name among his people, and good hopes of a share in the heavenly Canaan, we must account ourselves blessed. II. The solemn charge Jacob gave them concerning his burial, which is a repetition of what he had before given to Joseph. See how he speaks of death, now that he is dying: I am to be gathered unto my people, Gen 49:29. Note, It is good to represent death to ourselves under the most desirable images, that the terror of it may be taken off. Though it separates us from our children and our people in this world, it gathers us to our fathers and to our people in the other world. Perhaps Jacob uses this expression concerning death as a reason why his sons should bury him in Canaan; for, says he, "I am to be gathered unto my people, my soul must go to the spirits of just men made perfect: and therefore bury me with my fathers, Abraham and Isaac, and their wives," Gen 49:31. Observe, 1.

— Matthew Henry's Concise Commentary (public domain)

all these are the twelve tribes of Israel--or ancestors. Jacob's prophetic words obviously refer not so much to the sons as to the tribes of Israel.

— Jamieson-Fausset-Brown Commentary (public domain)