Numbers 10:6
When you sound the alarm the second time, those encamped on the south are to begin to travel. Alarms are to be sounded for their travels.
Numbers 2:10-16
"Toward the south is to be the division of the camp of Reuben under their standard. The leader of Reuben is to be Shedeur's son Elizur.
Numbers 10:18
Then the standard of the camp of Reuben set out, accompanied by its army with Shedeur's son Elizur in charge.
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
"Toward the south is to be the division of the camp of Reuben under their standard. The leader of Reuben is to be Shedeur's son Elizur.