The LORD spoke to Moses, saying, “Make two trumpets of silver.
You shall make them of beaten work.
You shall use them for the calling of the congregation and for the journeying of the camps.
When they blow them, all the congregation shall gather themselves to you at the door of the Tent of Meeting.
If they blow just one, then the princes, the heads of the thousands of Israel, shall gather themselves to you.
When you blow an alarm, the camps that lie on the east side shall go forward.