Numbers 10:1-10

The LORD said to Moses, “Make two trumpets of hammered silver, and use them to call the people together and to march out of camp. When both trumpets are blown, the people should gather before you at the entrance to the Meeting Tent. If you blow only one trumpet, the leaders, the heads of the family groups of Israel, should meet before you. When you loudly blow the trumpets, the tribes camping on the east should move. When you loudly blow them again, the tribes camping on the south should move; the loud sound will tell them to move. When you want to gather the people, blow the trumpets, but don’t blow them as loudly. “Aaron’s sons, the priests, should blow the trumpets. This is a law for you and your descendants from now on. When you are fighting an enemy who attacks you in your own land, blow the trumpets loudly. The LORD your God will take notice of you and will save you from your enemies. Also blow your trumpets at happy times and during your feasts and at New Moon festivals. Blow them over your burnt offerings and fellowship offerings, because they will help you remember your God. I am the LORD your God.”