20 From the sons of Reuben, the firstborn of Israel, according to the records of their clans and families, counting one by one the names of every male twenty years of age or older who could serve in the army,
Numbers 1:20 Cross References - MSB
Genesis 29:32
32 And Leah conceived and gave birth to a son, and she named him Reuben, for she said, “The LORD has seen my affliction. Surely my husband will love me now.”
Genesis 46:9
9 The sons of Reuben: Hanoch, Pallu, Hezron, and Carmi.
Genesis 49:3-4
Numbers 2:10-11
Numbers 26:5-7
1 Chronicles 5:1
1 These were 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 Reuben defiled his father’s bed. So he is not reckoned according to birthright.