Bible Verses About Trumpet: Used in war, of Abijah

Therefore God is the leader in our army, and his priests who sound with trumpets, and resound against you: O children of Israel, fight not against the Lord the God of your fathers, for it is not good for you.

And when Juda looked back, they saw the battle coming upon them both before and behind, and they cried to the Lord: and the priests began to sound with the trumpets.