“When you blow an alarm, the camps that lie on the east side shall go forward.”
Numbers 10:5 (WEB)
Context Reading
3When they blow them, all the congregation shall gather themselves to you at the door of the Tent of Meeting. 4If they blow just one, then the princes, the heads of the thousands of Israel, shall gather themselves to you. 5When you blow an alarm, the camps that lie on the east side shall go forward. 6When 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. 7But when the assembly is to be gathered together, you shall blow, but you shall not sound an alarm.