'Trumpets' in the Bible

“Make two trumpets of hammered silver to summon the community and have the camps set out.

The sons of Aaron, the priests, are to sound the trumpets. Your use of these is a permanent statute throughout your generations.

“When you enter into battle in your land against an adversary who is attacking you, sound short blasts on the trumpets, and you will be remembered before the Lord your God and be delivered from your enemies.

You are to sound the trumpets over your burnt offerings and your fellowship sacrifices and on your joyous occasions, your appointed festivals, and the beginning of each of your months. They will serve as a reminder for you before your God: I am Yahweh your God.”

Moses sent 1,000 from each tribe to war. They went with Phinehas son of Eleazar the priest, in whose care were the holy objects and signal trumpets.