Numbers 10:1-10

The LORD spoke to Moses, saying, “Make two silver trumpets. Of hammered work you shall make them, and you shall use them for summoning the congregation and for breaking camp. And when both are blown, all the congregation shall gather themselves to you at the entrance of the tent of meeting. But if they blow only one, then the chiefs, the heads of the tribes of Israel, shall gather themselves to you. When you blow an alarm, the camps that are on the east side shall set out. And when you blow an alarm the second time, the camps that are on the south side shall set out. An alarm is to be blown whenever they are to set out. But when the assembly is to be gathered together, you shall blow a long blast, but you shall not sound an alarm. And the sons of Aaron, the priests, shall blow the trumpets. The trumpets shall be to you for a perpetual statute throughout your generations. And when you go to war in your land against the adversary who oppresses you, then you shall sound an alarm with the trumpets, that you may be remembered before the LORD your God, and you shall be saved from your enemies. On the day of your gladness also, and at your appointed feasts and at the beginnings of your months, you shall blow the trumpets over your burnt offerings and over the sacrifices of your peace offerings. They shall be a reminder of you before your God: I am the LORD your God.”