Joshua 6:4-8

4And seven priests shall carry before the ark seven blast-trumpets; and on the seventh day ye shall go round the city seven times, and the priests shall blow with the trumpets.

5And it shall come to pass when they make a long blast with the blast-horn, that all the people on hearing the sound of the trumpet shall shout with a great shout; and the wall of the city shall fall flat, and the people shall go up, each one straight before him.

6And Joshua the son of Nun called the priests, and said to them, Carry the ark of the covenant, and seven priests shall carry seven blast-trumpets before the ark of Jehovah.

7And he said to the people, Pass on, go round the city, and they that are armed shall pass on before the ark of Jehovah.

8And it came to pass when Joshua had spoken to the people, that the seven priests carrying the seven blast-trumpets before Jehovah passed on and blew with the trumpets; and the ark of the covenant of Jehovah went after them.