Numbers 26:28
The tribe of Joseph, listed according to their families, included Manasseh and Ephraim.
Genesis 46:20
Joseph's sons born in the land of Egypt were Manasseh and Ephraim, whom Asenath, daughter of Potiphera, the priest of On, bore for him.
Genesis 41:51-52
Joseph named his firstborn son Manasseh because, he said, "God has made me forget all of my hard life and my father's house."
Genesis 48:5
You have two sons who were born to you in Egypt before I came to be with you, whom I now take as my own. Ephraim and Manasseh are mine, just as Reuben and Simeon are.
Genesis 48:13-20
Then he brought them both close to his father, placing Ephraim with his right hand toward Israel's left and Manasseh with his left hand toward Israel's right.