Numbers 10:7-9

New Catholic Bible

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. ⁹ When you go into battle against an enemy who is oppressing you in your own land, sound a blast on the trumpets. Then you will be remembered by the Lord, your God, and you will be saved.