Judges 7:20 (KJV)

When I blow with a trumpet, I and all that are with me, then blow ye the trumpets also on every side of all the camp, and say, The sword of the Lord, and of Gideon.

So Gideon, and the hundred men that were with him, came unto the outside of the camp in the beginning of the middle watch; and they had but newly set the watch: and they blew the trumpets, and brake the pitchers that were in their hands.

And the three companies blew the trumpets, and brake the pitchers, and held the lamps in their left hands, and the trumpets in their right hands to blow withal: and they cried, The sword of the Lord, and of Gideon.

And they stood every man in his place round about the camp: and all the host ran, and cried, and fled.

And the three hundred blew the trumpets, and the Lord set every man’s sword against his fellow, even throughout all the host: and the host fled to Beth–shittah in Zererath, and to the border of Abel–meholah, unto Tabbath.