Numbers 10:8-10

New Catholic Bible

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. ¹⁰ Also, at times of rejoicing, your solemn feasts and your new moon celebrations, you are to sound the trumpets over the burnt offerings and the peace offerings. They will be a memorial for you to your God. I am the Lord, your God.”