Numbers 1:20

New Century Version

The tribe of Reuben, the first son born to Israel, was counted; all the men twenty years old or older who were able to serve in the army were listed by name with their families and family groups.

Cross References

1 Chronicles 5:1

Reuben was Israel’s first son. Reuben should have received the special privileges of the oldest son, but he had sexual relations with his father’s slave woman. So those special privileges were given to Joseph’s sons. (Joseph was a son of Israel.) In the family history Reuben’s name is not listed as the first son.

Genesis 46:9

Reuben’s sons were Hanoch, Pallu, Hezron, and Carmi.

Genesis 29:32

Leah became pregnant and gave birth to a son. She named him Reuben, because she said, “The Lord has seen my troubles. Surely now my husband will love me.”

Numbers 1:21

The tribe of Reuben totaled 46,500 men.

Genesis 35:23

He had six sons by his wife Leah: Reuben, his first son, then Simeon, Levi, Judah, Issachar, and Zebulun.