Joshua 6:4-8

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

5And it shall be, 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 go up every man straight before him.

6And Joshua the son of Nun called the priests, and said unto them, Take up the ark of the covenant, and let seven priests bear seven trumpets of rams’ horns before the ark of the LORD.

7And they said unto the people, Pass on, and compass the city, and let the armed men pass on before the ark of the LORD.

8And it was so, that when Joshua had spoken unto the people, the seven priests bearing the seven trumpets of rams’ horns before the LORD passed on, and blew with the trumpets: and the ark of the covenant of the LORD followed them.