Genesis 46:3 - Ellicott's Commentary On The Whole Bible

I am God, the God of thy father. — Heb., I am the El, the Elohim of thy father. This is the last revelation given to Jacob, nor is any other supernatural event recorded until the vision of the burning bush (Exodus 3:4). It is brief, clear, and decisive, and every clause is weighty. Jacob is to migrate into Egypt, his race is to grow there into a nation, so that the stay there would be long; God’s presence and blessing will accompany and remain with them, and finally will bring them back to the promised land. For himself, too, there is the promise that Joseph will tend his sick bed and be with him at his death.