Joshua 6:6-8

6Then Joshua the son of Nun called the priests and said to 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 to the people, “Proceed, and march around the city, and let him who is armed advance before the ark of the Lord.”

8So it was, when Joshua had spoken to the people, that the seven priests bearing the seven trumpets of rams’ horns before the Lord advanced and blew the trumpets, and the ark of the covenant of the Lord followed them.