Genesis 48:15-20

And he blessed Joseph, and said, The God before whom my fathers Abraham and Isaac did walk, the God who hath fed me all my life long unto this day, the angel who hath redeemed me from all evil, bless the lads; and let my name be named on them, and the name of my fathers Abraham and Isaac; and let them grow into a multitude in the midst of the earth. And when Joseph saw that his father laid his right hand upon the head of Ephraim, it displeased him: and he held up his father’s hand, to remove it from Ephraim’s head unto Manasseh’s head. And Joseph said unto his father, Not so, my father; for this is the first-born; put thy right hand upon his head. And his father refused, and said, I know it, my son, I know it; he also shall become a people, and he also shall be great: howbeit his younger brother shall be greater than he, and his seed shall become a multitude of nations. And he blessed them that day, saying, In thee will Israel bless, saying, God make thee as Ephraim and as Manasseh: and he set Ephraim before Manasseh.