Genesis 48:3-6

3And Jacob said unto Joseph, God Almighty appeared unto me at Luz in the land of Canaan, and blessed me,

4and said unto me, Behold, I will make thee fruitful, and multiply thee, and I will make of thee a company of peoples, and will give this land to thy seed after thee for an everlasting possession.

5And 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.

6And thy issue, that thou begettest after them, shall be thine; they shall be called after the name of their brethren in their inheritance.