Numbers 2:10

The flag of the camp. of Reuben, south, according to their armies: and the chief for the sons of Reuben, Elizur, the son of Shedeur.

Numbers 1:5

And these the names of the men who shall stand with you: for Reuben: Elizur, son of Shedeur.

Genesis 49:3-4

Reuben, my first-born, thou my strength, and the beginning of my strength, the abundance of elevation, and the abundance of might

Numbers 7:30

In the fourth day the chief of the sons of Reuben, Elizur the son of Shedcur:

Numbers 7:35

And for a sacrifice of peace, two oxen, five rams, five he goats, five lambs, sons of a year; this the offering of Elizur, son of Shedeur.

Numbers 10:18

And the flag of the camp of Reuben removed according to their army, and over his army, Elizur, son of Shedur.

1 Chronicles 5:1

And the sons of Reuben the first-born of Israel, (for he the firstborn; and in his defiling his father's bed, the birth-right was given to the sons of Joseph the son of Israel; and not to be enrolled for the birthright

Treasury of Scripture Knowledge

Summary

On the south side shall be the standard of the camp of Reuben according to their armies: and the captain of the children of Reuben shall be Elizur the son of Shedeur.

Bible References

Camp of reuben

Genesis 49:3
Reuben, my first-born, thou my strength, and the beginning of my strength, the abundance of elevation, and the abundance of might
1 Chronicles 5:1
And the sons of Reuben the first-born of Israel, (for he the firstborn; and in his defiling his father's bed, the birth-right was given to the sons of Joseph the son of Israel; and not to be enrolled for the birthright

Elizur

Numbers 1:5
And these the names of the men who shall stand with you: for Reuben: Elizur, son of Shedeur.
Numbers 7:30
In the fourth day the chief of the sons of Reuben, Elizur the son of Shedcur:
Numbers 10:18
And the flag of the camp of Reuben removed according to their army, and over his army, Elizur, son of Shedur.

General references

Numbers 1:20
And the sons of Reuben, the firstborn of Israel, shall be their generations, according to their families, according to the house of their fathers, according to the number of names, according to their heads, every male from the son of twenty years and above, all going forth to war.
Numbers 3:29
The families of the sons of Kohath shall encamp by the thigh of the tent to the south.
Numbers 7:30
In the fourth day the chief of the sons of Reuben, Elizur the son of Shedcur: