Not in an authoritative way, as the greater blesseth the less, but in a general manner, i.e. he saluted him, thanked him for all his favours to him and his, and prayed to God to bless and recompense him for it. Thus blessing is put for saluting, 1 Samuel 13:10 2 Kings 4:29; for praying, Numbers 6:23,24; for thanksgiving, Matthew 26:26, compare with Luke 22:19.
Related Commentaries of Genesis 47:7
Genesis 47:7
7 And Joseph brought in Jacob his father, and set him before Pharaoh: and Jacob blessed Pharaoh.