Joshua 6:4-5

And seven priests shall bear seven trumpets of rams’ horns before the ark: and the seventh day ye shall compass the city seven times, and the priests shall blow the trumpets. And it shall be, that, when they make a long blast with the ram’s horn, and when ye hear the sound of the trumpet, all the people shall shout with a great shout; and the wall of the city shall fall down flat, and the people shall go up every man straight before him.