Joshua 6:4-7

Have seven priests carry trumpets made from horns of male sheep and have them march in front of the Ark. On the seventh day march around the city seven times and have the priests blow the trumpets as they march. They will make one long blast on the trumpets. When you hear that sound, have all the people give a loud shout. Then the walls of the city will fall so the people can go straight into the city.” So Joshua son of Nun called the priests together and said to them, “Carry the Ark of the Agreement. Tell seven priests to carry trumpets and march in front of it.” Then Joshua ordered the people, “Now go! March around the city. The soldiers with weapons should march in front of the Ark of the Agreement with the LORD.”