Nothing can be more evident than that the battle was the Lord's; for the army of Israel did nothing but alarm, make a great noise, and look on. Stand still, and see the salvation of the Lord. Exodus 14:13-14.
Related Commentaries of Judges 7:20
Judges 7:20-21
20 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.
21 And they stood every man in his place round about the camp: and all the host ran, and cried, and fled.