Genesi 48:1 Midrash: Pesikta Rabbati, Midrash Tanchuma, Midrash Tanchuma Buber & Ein Yaakov (Glick Edition)

... [What about all] the praise of Joseph, who exceeded in the honor of his father? And yet he did not enter into him all the time, such that were it not that they came to tell him, "Your father is sick," he would not have known! Rather this is to inform you of his righteousness. For he did not want to be alone with his father, lest he say to him, "How did your brothers act with you?" And [then] he would curse them.... Hence he did not go to his father all the time.)

And it came to pass after these things, that one said to Joseph: “Benold, thy father is sick” (Gen. 48:1). May it please our master to teach us whether a benediction may be recited over the light or the spices stationed at the side of a corpse? Our masters teach us: A benediction may not be recited over the light or the spices used at the side of a corpse. What is the basis of this decision? It is written: The dead praise not the Lord (Ps. 115:17).

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.