John Gill Commentary 1 Chronicles 5:3

"the sons of Reuben the first-born of Israel: Hanoch, and Pallu, Hezron, and Carmi." — 1 Chronicles 5:3 (ASV)

The sons, [I say], of Reuben the firstborn of Israel, were,
Hanoch, and Pallu, Hezron, and Carmi .
] As in (Genesis 46:9) .