Numbers 10:2-11

²Make thee two trumpets of silver; of a whole piece thou shalt make them: that thou mayest use them for the calling of the assembly, and for the journeying of the camps.

³And when they shall blow with them, all the assembly shall assemble themselves to thee at the door of the tabernacle of the congregation.

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

⁵When ye blow an alarm, then the camps that lie on the east parts shall go forward.

⁶When you 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.

⁷But when the congregation is to be gathered together, you shall blow, but you shall not sound an alarm.

⁸And the sons of Aaron, the priests, shall blow with the trumpets; and they shall be to you for an ordinance for ever throughout your generations.

⁹And if ye go to war in your land against the enemy that oppresseth you, then ye shall blow an alarm with the trumpets; and ye shall be remembered before the Lord your God, and ye shall be saved from your enemies.

¹⁰Also in the day of your gladness, and in your solemn days, and in the beginnings of your months, ye shall blow with the trumpets over your burnt offerings, and over the sacrifices of your peace offerings; that they may be to you for a memorial before your God: I am the Lord your God.

¹¹And it came to pass on the twentieth day of the second month, in the second year, that the cloud was taken up from off the tabernacle of the Testimony.