Numbers 10:2–5

2 “Make two silver trumpets for yourself; you shall make them of hammered work; you shall use them for acalling the congregation and for directing the movement of the camps. 3 When bthey blow both of them, all the congregation shall gather before you at the door of the tabernacle of meeting. 4 But if they blow only one, then the leaders, the cheads of the divisions of Israel, shall gather to you. 5 When you sound the dadvance, ethe camps that lie on the east side shall then begin their journey.