Numbers 10:6 in the World English Bible
When you blow an alarm the second time, the camps that lie on the south side shall go forward. They shall blow an alarm for their journeys.
Context
5 When ye blow an alarm, then the camps that lie on the east parts shall go forward.
6 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.
7 But when the congregation is to be gathered together, ye shall blow, but ye shall not sound an alarm.