Genesis 48:5

48:5 “Now, as for your two sons, who were born to you in the land of Egypt before I came to you in Egypt, they will be mine. Ephraim and Manasseh will be mine just as Reuben and Simeon are.

Genesis 48:14

48:14 Israel stretched out his right hand and placed it on Ephraim’s head, although he was the younger. Crossing his hands, he put his left hand on Manasseh’s head, for Manasseh was the firstborn.