Genesis 48:5
5 And now your ctwo sons, who were born to you in the land of Egypt before I came to you in Egypt, dare mine; Ephraim and Manasseh shall be mine, as Reuben and Simeon are.
1 Chronicles 5:1–2
Descendants of Reuben
1 The sons of Reuben the firstborn of Israel (cfor he was the firstborn, but because dhe defiled his father’s couch, ehis birthright was given to the sons of Joseph the son of Israel, so that he could not be enrolled as the oldest son; 2 fthough Judah became strong among his brothers and a gchief came from him, yet the birthright belonged to Joseph),