Numbers 10:6-8

Darby Translation

⁶ And when ye blow an alarm the second time, the camps that lie southward shall set forward; they shall blow an alarm on their setting forward.

⁷ And when the congregation is to be gathered together, ye shall blow, but ye shall not blow an alarm:

⁸ the sons of Aaron, the priests, shall blow with the trumpets; and they shall be to you for an everlasting statute throughout your generations.