Joshua 6:7

5It shall be that when they make a long blast with the ram’s horn, and when you hear the sound of the trumpet, all the people shall shout with a great shout; then the city wall will fall down flat, and the people shall go up, every man straight in front of him.”

6Joshua 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 LORD’s ark.”

7They said to the people, “Advance! March around the city, and let the armed men pass on before the LORD’s ark.”

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

9The armed men went before the priests who blew the trumpets, and the ark went after them. The trumpets sounded as they went.