Numbers 26:28
The descendants of Joseph by their families: Manasseh and Ephraim.
Genesis 46:20
Manasseh and Ephraim were born to Joseph in the land of Egypt. Asenath daughter of Potiphera, priest of On, bore them to him.
Genesis 41:51-52
Joseph named the firstborn Manasseh, saying, "Certainly God has made me forget all my trouble and all my father's house."
Genesis 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 48:13-20
Joseph positioned them; he put Ephraim on his right hand across from Israel's left hand, and Manasseh on his left hand across from Israel's right hand. Then Joseph brought them closer to his father.