Genesis 48:1, 5

Now it came about after these things that Joseph was told, “Behold, your father is sick.” So he took his two sons Manasseh and Ephraim with him.

Now your two sons, who were born to you in the land of Egypt before I came to you in Egypt, are mine; Ephraim and Manasseh shall be mine, as Reuben and Simeon are.