Midrash su Genesi 48:14

... [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.)

R. Samuel the son of Nahman stated: The Holy Spirit forsook Jacob twice. Once when he wished to bless Manasseh and Ephraim, and again when he was about to reveal the time of redemption. And Israel stretched out his right hand, and laid it upon Ephraim’s head (Gen. 48:14). He began to bless him with the words: And let them increase like fish (ibid., v. 16). He thus indicated that Ephraim’s descendants would be caught like fishes, as it is said: Say now “Shibboleth”; and he said “Sibboleth” (Judg. 12:6).¹¹Just as fishes are caught by their mouths, so too forty-two hundred Ephraimites were killed because they could not pronounce the word Shibboleth correctly. When Joseph saw that his father was laying his right hand on the head of Ephraim, it displeased him and He held up his father’s hand, to remove it (Gen. 48:17). Jacob rebuked him, saying: “Do you seek to turn away the hand that vanquished the foremost among the angels?” R. Yohanan said: Jacob’s arms were like two columns in the public baths in Tiberias. And Joseph said unto his father: “Not so, my father, only this one is the firstborn” (ibid. , v. 18). And his father refused and said: “I know it, my son; I know it” (ibid., v. 19). He foresaw that Gideon would descend from Manasseh, but that his younger brother was the more important one, since Joshua would descend from him. And he blessed them that day, saying: “By thee shall Israel bless, saying: God make thee as Ephraim and Manasseh” (ibid., v. 20). He mentioned Ephraim before he mentioned Manasseh. When was his blessing finally fulfilled? At the time of the consecration of the chiefs. Then Ephraim brought his offering on the seventh day, and Manasseh on the eighth, in fulfillment of the scriptural verse: That confirmeth the word of his servant and performeth the counsel of his messengers (Isa. 44:26).