Numbers 10:2-10

10:2 “Make two trumpets of silver; you are to make them from a single hammered piece. You will use them for assembling the community and for directing the traveling of the camps. 10:3 When they blow them both, all the community must come to you to the entrance of the tent of meeting.

10:4 “But if they blow with one trumpet, then the leaders, the heads of the thousands of Israel, must come to you. 10:5 When you blow an alarm, then the camps that are located on the east side must begin to travel. 10:6 And when you blow an alarm the second time, then the camps that are located on the south side must begin to travel. An alarm must be sounded for their journeys. 10:7 But when you assemble the community, you must blow, but you must not sound an alarm. 10:8 The sons of Aaron, the priests, must blow the trumpets; and they will be to you for an eternal ordinance throughout your generations. 10:9 If you go to war in your land against an adversary who opposes you, then you must sound an alarm with the trumpets, and you will be remembered before the Lord your God, and you will be saved from your enemies.

10:10 “Also in the time when you rejoice, such as on your appointed festivals or at the beginnings of your months, you must blow with your trumpets over your burnt offerings and over the sacrifices of your peace offerings, so that they may become a memorial for you before your God: I am the Lord your God.”