Numbers 2:10

the standard of he camp of Reuben south-wards, by their hosts, - even the prince of the sons of Reuben, Elizur son of Shedeur;

Numbers 1:5

These, then, are the names of the men who shall stand with you, - Of Reuben, Elizur, son of Shedeur;

Genesis 49:3-4

Reuben, my first-born, thou, My vigour, and the first-fruit of my strength, - Pre-eminence of elevation and pre-eminence of power:

Numbers 7:30

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

Numbers 7:35

and as a peace-offering, two oxen, five rams five he-goats, five he-lambs of the first year, - this, was the offering of Elizur, son of Shedeur.

Numbers 10:18

Then set forward the standard of the camp of Reuben, by their hosts, - and over his own host, Elizur, son of Shedeur;

1 Chronicles 5:1

And the sons of Reuben the firstborn of Israel, for, he, was the firstborn, but because he defiled the couch of his father, his birthright was given to the sons of Joseph son of Israel, - and he is not to be enrolled in the place of firstborn,

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 vigour, and the first-fruit of my strength, - Pre-eminence of elevation and pre-eminence of power:
1 Chronicles 5:1
And the sons of Reuben the firstborn of Israel, for, he, was the firstborn, but because he defiled the couch of his father, his birthright was given to the sons of Joseph son of Israel, - and he is not to be enrolled in the place of firstborn,

Elizur

Numbers 1:5
These, then, are the names of the men who shall stand with you, - Of Reuben, Elizur, son of Shedeur;
Numbers 7:30
On the fourth day, the prince of he sons of Reuben, - Elizur, son of Shedeur:
Numbers 10:18
Then set forward the standard of the camp of Reuben, by their hosts, - and over his own host, Elizur, son of Shedeur;

General references

Numbers 1:20
And they were as followeth - The sons of Reuben, the firstborn of Israel, in their pedigrees - by their families, by their ancestral houses, in the counting of names, by their polls, every male, from twenty years old and upwards, every one able to go forth to war;
Numbers 3:29
The, families of the sons of Kohath, were to encamp, - on the side of the habitation, south-ward.
Numbers 7:30
On the fourth day, the prince of he sons of Reuben, - Elizur, son of Shedeur: