Numbers 10
5 Ref When you blow an alarm, the camps that lie on the east side shall take their journey.
6 Ref When you blow an alarm the second time, the camps that lie on the south side shall take their journey: they shall blow an alarm for their journeys.
7 Ref But when the assembly is to be gathered together, you shall blow, but you shall not sound an alarm.
8 Ref The sons of Aaron, the priests, shall blow the trumpets; and they shall be to you for a statute forever throughout your generations.
9 Ref When you go to war in your land against the adversary who oppresses you, then you shall sound an alarm with the trumpets; and you shall be remembered before Yahweh your God, and you shall be saved from your enemies.