Numbers 10:6-8

New Catholic Bible

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. ⁷ To gather together the assembly, sound the trumpets but not with the same signal.

⁸ “The sons of Aaron, the priests, will sound the trumpets. This is to be an everlasting ordinance throughout all your generations.