Charles Ellicott Commentary Genesis 47:7

"And Joseph brought in Jacob his father, and set him before Pharaoh: and Jacob blessed Pharaoh." — Genesis 47:7 (ASV)

Jacob blessed Pharaoh. —The presentation of Jacob to Pharaoh seems to have been a much more solemn matter than that of Joseph’s brothers. Pharaoh looks upon them with interest as the brothers of his vizier, grants their request for permission to live in Goshen, and even empowers Joseph to make the ablest of them chief herdsmen over the royal cattle.

But Jacob had reached an age that gave him great dignity, for to an Egyptian, 120 was the utmost limit of longevity. Jacob was now 130, and Pharaoh treats him with the greatest honour, and twice accepts his blessing.

This must signify more than the usual greeting, in which everyone presented to the king prayed for the extension of his life. Pharaoh probably bowed before Jacob as a saintly personage and received a formal benediction.