Genesis 48:1, 5

And it came to pass after these things, that one said to Joseph, Behold, thy father is sick: and he took with him his two sons, Manasseh and Ephraim.

And now thy two sons, who were born unto thee in the land of Egypt before I came unto thee into Egypt, are mine; Ephraim and Manasseh, even as Reuben and Simeon, shall be mine.