Midrasch zu Tehillim 37:22

And it came to pass after these things (Gen. 48:1). Scripture states in response to this verse: For such as are blessed of Him shall inherit the land; and they that are cursed of Him shall be cut off (Ps. 37:22). R. Meir said: Every one who blesses Israel is considered to have blessed the Holy Spirit, since it is said: For such as blessed Him. The verse is not written “blessed them” but rather blessed Him. R. Simeon the son of Yohai declared: Every one who assists Israel is considered to be assisting the Holy Spirit, as is said: Curse ye bitterly the inhabitants thereof, because they came not to help of the Lord (Judg. 5:23). Does the Holy One, blessed be He, actually require assistance? This verse teaches us that one who aids Israel is considered to be aiding the Holy Spirit. R. Ishmael said: You find that righteous men bless their children when they are about to leave this life. That is why Isaac said to Esau: And bless thee before the Lord before my death (Gen. 27:7). Therefore, when Jacob became ill, Joseph took his two sons unto his father so that he might bless them.