Genesis 48
17 Ref When Joseph saw that his father laid his right hand on the head of Ephraim, it displeased him. He held up his father's hand, to remove it from Ephraim's head to Manasseh's head.
18 Ref Joseph said to his father, "Not so, my father; for this is the firstborn; put your right hand on his head."
19 Ref His father refused, and said, "I know, my son, I know. He also will become a people, and he also will be great. However, his younger brother will be greater than he, and his seed will become a multitude of nations."