Joshua 6:1-4

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

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

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

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.