Numbers 10:6-8

Young's Literal Translation

⁶ `And ye have blown -- a second shout, and the camps which are encamping southward have journeyed; a shout they blow for their journeys.

⁷ `And in the assembling of the assembly ye blow, and do not shout;

⁸ and sons of Aaron, the priests, blow with the trumpets; and they have been to you for a statute age-during to your generations.