During the time he was living there, Reuben went and slept with Bilhah, his father's concubine, and Israel found out about it. These were the twelve sons of Jacob:
The sons of Reuben the firstborn of Israel. (Though he was the firstborn, his birthright was given to the sons of Joseph son of Israel because he had defiled his father's bed. That is why Reuben is not listed in the genealogy according to birthright,
These were the Israelite family heads. The sons of Reuben, the firstborn son of Israel, were Hanok and Pallu, Hezron and Karmi. These were the families of Reuben.
The descendants of Reuben (he was Israel's firstborn son), men aged twenty or over, were recorded by name according to the genealogical records of their tribe and families. All those registered who could serve in the army
“Census the men twenty years of age or older, following the instructions the Lord gave to Moses.” The following is the genealogical record of those who left the land of Egypt.