Genesis 48:3-6

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

4and said to me, 'Behold, I will make you fruitful and multiply you, and I will make of you a company of peoples and will give this land to your offspring after you for an everlasting possession.'

5And 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.

6And the children that you fathered after them shall be yours. They shall be called by the name of their brothers in their inheritance.