'Sword of the Lord' in the Bible

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.

And 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.