1 Chronicles 5:1-3

Reuben was Israel’s first son. Reuben should have received the special privileges of the oldest son. But he had sexual relations with his father’s wife. So those privileges were given to Joseph’s sons. In the family history, Reuben’s name is not listed as the first son. Judah became stronger than his brothers, so the leaders came from his family. But Joseph’s family got the other privileges that belong to the oldest son. Reuben’s sons were Hanoch, Pallu, Hezron, and Carmi.