'Firstborn of Israel' in the Bible

These are the heads of their fathers’ families:The sons of Reuben, the firstborn of Israel:Hanoch and Pallu, Hezron and Carmi.These are the clans of Reuben.

The descendants of Reuben, the firstborn of Israel: according to their family records by their clans and their ancestral houses, counting one by one the names of every male 20 years old or more, everyone who could serve in the army,

Reuben was the firstborn of Israel.Reuben’s descendants:the Hanochite clan from Hanoch;the Palluite clan from Pallu;

These were the sons of Reuben the firstborn of Israel. He was the firstborn, but his birthright was given to the sons of Joseph son of Israel, because Reuben defiled his father’s bed. He is not listed in the genealogy according to birthright.