Numbers 10:6-8

New Century Version

⁶ When you loudly blow them again, the tribes camping on the south should move; the loud sound will tell them to move. ⁷ When you want to gather the people, blow the trumpets, but don’t blow them as loudly.

⁸ “Aaron’s sons, the priests, should blow the trumpets. This is a law for you and your descendants from now on.