Numbers 10:4 BBE

²  Make two silver horns of hammered work, to be used for getting the people together and to give the sign for the moving of the tents.

³  When they are sounded, all the people are to come together to you at the door of the Tent of meeting.

⁴  If only one of them is sounded, then the chiefs, the heads of the thousands of Israel, are to come to you.

⁵  When a loud note is sounded, the tents placed on the east side are to go forward.

⁶  At the sound of a second loud note, the tents on the south side are to go forward: the loud note will be the sign to go forward.