C. F. Keil and Franz Delitzsch on Genesis 46:1

“So Israel took his journey (from Hebron, Gen 37:14) with all who belonged to him, and came to Beersheba.” There, on the border of Canaan, where Abraham and Isaac had called upon the name of the Lord (Gen 21:33; Gen 26:25), he offered sacrifices to the God of his father Isaac, ut sibi firmum et ratum esse testetur faedus, quod Deus ipse cum Patribus pepigerat (Calvin). Even though Jacob might see the ways of God in the wonderful course of his son Joseph, and discern in the friendly invitation of Joseph and Pharaoh, combined with the famine prevailing in Canaan, a divine direction to go into Egypt; yet this departure from the land of promise, in which his fathers had lived as pilgrims, was a step which necessarily excited serious thoughts in his mind as to his own future and that of his family, and led him to commend himself and his followers to the care of the faithful covenant God, whether in so doing he thought of the revelation which Abram had received (Gen 15:13-16), or not.