Numbers 10:4-6

New Catholic Bible

⁴ If only one is sounded, the leaders, the heads of the clans of Israel, are to assemble before you. ⁵ When the advance is sounded, the camps that lie on the east side will set out. ⁶ With the second blast of the trumpet, the camps that lie to the south side will set out. The trumpet blast will signal their setting out.