Numbers 1:20

And the sons of Reuben, Israel's eldest son, their generations, after their families, according to their fathers' houses, by the number of the names, according to their polls, every male from twenty years old and upward, all that went forth to military service:

Numbers 26:5-7

Reuben, the firstborn of Israel: the children of Reuben: of Enoch, the family of the Enochites; of Pallu, the family of the Palluites;

Numbers 2:10-11

The standard of the camp of Reuben shall be southward according to their hosts; and the prince of the sons of Reuben shall be Elizur the son of Shedeur;

Genesis 29:32

And Leah conceived, and bore a son, and called his name Reuben; for she said, Because Jehovah has looked upon my affliction; for now my husband will love me.

Genesis 46:9

And the sons of Reuben: Enoch, and Phallu, and Hezron, and Carmi.

Genesis 49:3-4

Reuben, thou art my firstborn, My might, and the firstfruits of my vigour: Excellency of dignity, and excellency of strength.

1 Chronicles 5:1

And the sons of Reuben the firstborn of Israel (for he was the firstborn; but, inasmuch as he defiled his father's bed, his birthright was given to the sons of Joseph the son of Israel; but the genealogy is not registered according to the birthright,

Treasury of Scripture Knowledge

Summary

And the children of Reuben, Israel's eldest son, by their generations, after their families, by the house of their fathers, according to the number of the names, by their polls, every male from twenty years old and upward, all that were able to go forth to war;

Bible References

General references

Numbers 2:10
The standard of the camp of Reuben shall be southward according to their hosts; and the prince of the sons of Reuben shall be Elizur the son of Shedeur;
Numbers 26:5
Reuben, the firstborn of Israel: the children of Reuben: of Enoch, the family of the Enochites; of Pallu, the family of the Palluites;
Genesis 29:32
And Leah conceived, and bore a son, and called his name Reuben; for she said, Because Jehovah has looked upon my affliction; for now my husband will love me.
Genesis 46:9
And the sons of Reuben: Enoch, and Phallu, and Hezron, and Carmi.
Genesis 49:3
Reuben, thou art my firstborn, My might, and the firstfruits of my vigour: Excellency of dignity, and excellency of strength.
1 Chronicles 5:1
And the sons of Reuben the firstborn of Israel (for he was the firstborn; but, inasmuch as he defiled his father's bed, his birthright was given to the sons of Joseph the son of Israel; but the genealogy is not registered according to the birthright,