Judges 7:18-20

18When 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. 19So Gideon, and the hundred men that were with him, came to 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 broke the pitchers that were in their hands. 20And the three companies blew the trumpets, and broke the pitchers, and held the lamps in their left hands, and the trumpets in their right hands to blow with : and they cried, The sword of the LORD, and of Gideon.