Numbers 2:10

The standard of the camp of Reuben is southward, by their hosts; and the prince of the sons of Reuben is Elizur son of Shedeur;

Numbers 1:5

And these are the names of the men who stand with you: 'For Reuben -- Elizur son of Shedeur.

Genesis 49:3-4

Reuben! my first-born thou, My power, and beginning of my strength, The abundance of exaltation, And the abundance of strength;

Numbers 7:30

On the fourth day, Elizur, son of Shedeur, prince of the sons of Reuben; --

Numbers 7:35

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

Numbers 10:18

And the standard of the camp of Reuben hath journeyed, by their hosts, and over its host is Elizur son of Shedeur.

1 Chronicles 5:1

As to sons of Reuben, first-born of Israel -- for he is the first-born, and on account of his profaning the couch of his father hath his birthright been given to the sons of Joseph son of Israel, and he is not to be reckoned by genealogy 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 power, and beginning of my strength, The abundance of exaltation, And the abundance of strength;
1 Chronicles 5:1
As to sons of Reuben, first-born of Israel -- for he is the first-born, and on account of his profaning the couch of his father hath his birthright been given to the sons of Joseph son of Israel, and he is not to be reckoned by genealogy for the birthright,

Elizur

Numbers 1:5
And these are the names of the men who stand with you: 'For Reuben -- Elizur son of Shedeur.
Numbers 7:30
On the fourth day, Elizur, son of Shedeur, prince of the sons of Reuben; --
Numbers 10:18
And the standard of the camp of Reuben hath journeyed, by their hosts, and over its host is Elizur son of Shedeur.

General references

Numbers 1:20
And the sons of Reuben, Israel's first-born -- their births, by their families, by the house of their fathers, in the number of names, by their polls, every male from a son of twenty years and upward, every one going out to the host --
Numbers 3:29
The families of the sons of Kohath encamp by the side of the tabernacle southward.
Numbers 7:30
On the fourth day, Elizur, son of Shedeur, prince of the sons of Reuben; --