Joshua 6:12

So the ark of the LORD compassed the city, going about it once: and they came into the camp, and lodged in the camp.

And seven priests bearing seven trumpets of rams' horns before the ark of the LORD went on continually, and blew with the trumpets: and the armed men went before them; but the rereward came after the ark of the LORD, the priests going on, and blowing with the trumpets.