Numbers 10:4-6

King James Version

⁴ And if they blow but with one trumpet, then the princes, which are heads of the thousands of Israel, shall gather themselves unto thee.

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.