Numbers 10:7-9

Good News Translation

⁷ but in order to call the community together, long blasts are to be sounded. ⁸ The trumpets are to be blown by Aaron's sons, the priests.

“The following rule is to be observed for all time to come. ⁹ When you are at war in your land, defending yourselves against an enemy who has attacked you, sound the signal for battle on these trumpets. I, the Lord your God, will help you and save you from your enemies.