Joshua 6:11-14

So the ark of YAHWEH circled the city once, then they all came back to the camp in Gilgal and spent the night. Joshua rose bright and early the next morning, and the priests took up the ark of YAHWEH. The armed men and the seven priests carrying the seven shofars marched in front of the ark of YAHWEH blowing their shofars continually, and the rear guard followed the ark of YAHWEH, while the trumpets kept sounding. On the second day, they circled the city once and again returned to the camp. They repeated this pattern for six days.