Numbers 1:20
The genealogies of the descendants of Reuben, the firstborn of Israel, were recorded individually, according to their tribes and ancestral houses, as were the names of all the men 20 years and above who could serve in the army.
Numbers 26:5-7
From Reuben, Israel's firstborn, the descendants of Reuben included from Hanoch, the family of the descendants of Hanoch; from Pallu, the family of the descendants of Pallu;
Numbers 2:10-11
"Toward the south is to be the division of the camp of Reuben under their standard. The leader of Reuben is to be Shedeur's son Elizur.
Genesis 29:32
Leah conceived, bore a son, and named him Reuben, because she was saying, "The LORD had looked on my torture, so now my husband will love me."
Genesis 46:9
Reuben's sons Hanoch, Pallu, Hezron, and Carmi;
Genesis 49:3-4
"Reuben, you're my firstborn, my strength, and the first fruit of my vitality. You excel in rank and excel in power.
1 Chronicles 5:1
Here is a record of the descendants of Reuben, Israel's firstborn. (He was the firstborn, but because he defiled his father's marriage bed, his birthright was transferred to the descendants of Israel's son Joseph. As a result, Reuben is not enrolled in the genealogy according to the birthright.