Judges 7:16-18

16He divided his 300 men into three separate groups. He gave a trumpet and an empty pot to each soldier. Each man put a burning branch into his pot.

17Gideon said to his men, ‘Watch me carefully. When we get near to the enemy's camp, you must do the same thing that I do.

18You will be all around the camp. I and my group of men will make a noise with our trumpets. Then you must also make a noise with your trumpets. Then shout, “We are fighting for the Lord and for Gideon!” ’