The sons of Reuben the firstborn of Israel (he was the firstborn, but when he defiled his father’s marriage bed, his rights as firstborn were given to the sons of Joseph son of Israel; so he could not be listed in the genealogical record in accordance with his birthright,
References for 1 Chronicles 5:1
and though Judah was the strongest of his brothers and a ruler came from him, the rights of the firstborn belonged to Joseph)—
References for 1 Chronicles 5:2
the sons of Reuben the firstborn of Israel: Hanok, Pallu, Hezron and Karmi.
References for 1 Chronicles 5:3
The descendants of Joel: Shemaiah his son, Gog his son, Shimei his son,
Micah his son, Reaiah his son, Baal his son,
and Beerah his son, whom Tiglath-Pileser king of Assyria took into exile. Beerah was a leader of the Reubenites.
References for 1 Chronicles 5:6