Genesis 48:17-20

17When Joseph saw that his father had placed his right hand on Ephraim’s head, he thought it was a mistake and took his father’s hand to move it from Ephraim’s head to Manasseh’s.

18Joseph said to his father, “Not that way, my father! This one is the firstborn. Put your right hand on his head.”

19But his father refused and said, “I know, my son, I know! He too will become a tribe, and he too will be great; nevertheless, his younger brother will be greater than he, and his offspring will become a populous nation.”

20So he blessed them that day, putting Ephraim before Manasseh when he said, “The nation Israel will invoke blessings by you, saying, ‘May God make you like Ephraim and Manasseh.’”