Numbers 10:6
And when ye trump the second time, then the hosts that lie on the south side shall take their journey: for they shall trump when they take their journeys.
Numbers 2:10-16
"And on the south side, the standard of the host of Reuben shall lie with their companies; and the captain over the sons of Reuben, Elizur the son of Shedeur:
Numbers 10:18
Then the standard of the host of Reuben went forth with their armies, whose captain was Elizur the son of Shedeur.
Treasury of Scripture Knowledge
Summary
When ye blow an alarm the second time, then the camps that lie on the south side shall take their journey: they shall blow an alarm for their journeys.
The camps
Bible References
The camps
Numbers 2:10
"And on the south side, the standard of the host of Reuben shall lie with their companies; and the captain over the sons of Reuben, Elizur the son of Shedeur: