Judges 7:16-18

He divided his three hundred men into three groups and gave each man a shofar and a clay jar hiding a torch inside it. He told them, “Follow me! When I get to the edge of the camp, watch me closely and do exactly what I do. When my group and I blow our shofars, then you blow yours all around the camp and shout, ‘For YAHWEH and for Gideon!’ ”