Nehemiah 4:18
And each of the builders had his sword strapped at his side while he built. The man who sounded the trumpet was beside me.
Numbers 10:9
And when you go to war in your land against the adversary who oppresses you, then you shall sound an alarm with the trumpets, that you may be remembered before the LORD your God, and you shall be saved from your enemies.
2 Chronicles 13:12-17
Behold, God is with us at our head, and his priests with their battle trumpets to sound the call to battle against you. O sons of Israel, do not fight against the LORD, the God of your fathers, for you cannot succeed."