Ge 48:21 Then Israel said to Joseph, "Behold, I am dying, but God will be with you and bring you back to the land of your fathers.

 22 "Moreover I have given to you one portion above your brothers, which I took from the hand of the Amorite with my sword and my bow."


Again, this is to encourage Moses' original readers that the land they are about to possess is the land of their fathers (Abraham and Isaac). And so, they must not be tempted to go back to Egypt.

It is also a guide in dividing the land later on. That Shechem is to be given to Joseph and his descendants. Shechem is the territory which Jacob took from the hand of the Amorite. In Israel's history, Manasseh, later on, took possession of the land.