Judges 7:16-19

16He divided the 300 men into three groups and gave each man a ram’s horn and a clay jar with a torch in it.

17Then he said to them, “Keep your eyes on me. When I come to the edge of the camp, do just as I do.

18As soon as I and those with me blow the rams’ horns, blow your horns, too, all around the entire camp, and shout, ‘For the Lord and for Gideon!’”

19It was just after midnight, after the changing of the guard, when Gideon and the 100 men with him reached the edge of the Midianite camp. Suddenly, they blew the rams’ horns and broke their clay jars.