Joshua 6:4-5

Also, seven priests shall carry seven trumpets [made] of rams’ horns ahead of the ark; then on the seventh day you shall march around the city seven times, and the priests shall blow the trumpets. When they make a long blast with the ram’s horn, and when you hear the sound of the trumpet, all the people shall cry out with a great shout (battle cry); and the wall of the city will fall down in its place, and the people shall go up, each man [going] straight ahead [climbing over the rubble].”