Josh 6:2-5

2 The Lord said to Joshua, “See, I have handed Jericho over to you, along with its king and soldiers. 3 You shall march around the city, all the warriors circling the city once. Thus you shall do for six days, 4 with seven priests bearing seven trumpets of rams’ horns before the ark. On the seventh day you shall march around the city seven times, the priests blowing the trumpets. 5 When they make a long blast with the ram’s horn, as soon as you hear the sound of the trumpet, then all the people shall shout with a great shout; and the wall of the city will fall down flat, and all the people shall charge straight ahead.”