TSK · Numbers 1:20

Leah conceived, and bore a son, and she named him Reuben. For she said, "Because Yahweh has looked at my affliction. For now my husband will love me."

The sons of Reuben: Hanoch, Pallu, Hezron, and Carmi.

"On the south side shall be the standard of the camp of Reuben according to their divisions. The prince of the children of Reuben shall be Elizur the son of Shedeur.

The sons of Reuben the firstborn of Israel (for he was the firstborn; but, because he defiled his father's couch, his birthright was given to the sons of Joseph the son of Israel; and the genealogy is not to be reckoned after the birthright.