Numbers 1:20

Amplified Bible

The sons of Reuben, Israel’s (Jacob’s) firstborn, their generations, by their families (clans), by their fathers’ households, according to the number of names, head by head, every male from twenty years old and upward, all who were able to go to war:

Cross References

Genesis 29:32

Leah conceived and gave birth to a son and named him Reuben (See, a son!), for she said, “Because the Lord has seen my humiliation and suffering; now my husband will love me [since I have given him a son].”

Genesis 35:23

The sons of Leah: Reuben, Jacob’s firstborn, then Simeon, Levi, Judah, Issachar, and Zebulun;

Genesis 46:9

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

1 Chronicles 5:1

Now [we come to] the sons of Reuben the firstborn of Israel—for Reuben was the eldest, but because he defiled his father’s bed [with Bilhah his father’s concubine], his birthright was given to [Manasseh and Ephraim] the sons of Joseph [the favorite] son of Israel, so that he is not enrolled in the genealogy according to the birthright. [Gen 35:22; 48:15-22; 49:3, 4]

Numbers 1:21

those of the tribe of Reuben numbered 46,500.