Joshua 6:4, 13-16

And 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 the trumpets.

And the seven priests bearing the seven trumpets of rams’ horns before the ark of Jehovah went on continually, and blew the trumpets: and the armed men went before them; and the rearward came after the ark of Jehovah, the priests blowing the trumpets as they went. And the second day they compassed the city once, and returned into the camp: so they did six days. And it came to pass on the seventh day, that they rose early at the dawning of the day, and compassed the city after the same manner seven times: only on that day they compassed the city seven times. And it came to pass at the seventh time, when the priests blew the trumpets, Joshua said unto the people, Shout; for Jehovah hath given you the city.