Joshua 6:6-8

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 he said unto the people, Pass on, and compass the city, and let him that is armed pass on before the ark of the Lord.

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