Joshua 6:1-5 KJV

6 Now Jericho was straitly shut up because of the children of Israel: none went out, and none came in.

2 And the Lord said unto Joshua, See, I have given into thine hand Jericho, and the king thereof, and the mighty men of valour.

3 And ye shall compass the city, all ye men of war, and go round about the city once. Thus shalt thou do six days.

4 And seven priests shall bear before the ark seven trumpets of rams' horns: and the seventh day ye shall compass the city seven times, and the priests shall blow with the trumpets.

5 And it shall come to pass, 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 ascend up every man straight before him.