Joshua 6:1-5

Now Jericho was tightly shut because of the sons of Israel; no one went out and no one came in.

But the Lord said to Joshua, “See, I have handed Jericho over to you, with its king and the valiant warriors.

And you shall march around the city, all the men of war circling the city once. You shall do so for six days.

Also seven priests shall carry seven trumpets of rams’ horns in front of the ark; then on the seventh day you shall march around the city seven times, and the priests shall blow the trumpets.

It shall be that when they make a long blast with the ram’s horn, and when you hear the sound of the trumpet, all the people shall shout with a great shout; and the wall of the city will fall down flat, and the people shall go up, everyone straight ahead.”