Joshua 6:4, 13-16

Also, seven priests shall carry seven trumpets [made] of rams’ horns ahead of the ark; then on the seventh day you shall march around the city seven times, and the priests shall blow the trumpets.

The seven priests carrying the seven trumpets made of rams’ horns ahead of the ark of the LORD went on continually, blowing the trumpets; and the armed men went ahead of them and the rear guard came after the ark of the LORD, while the priests continued to blow the trumpets. On the second day they marched around the city once, and returned to the camp; they did this for six days. Then on the seventh day they got up early at daybreak and marched around the city in the same way seven times; only on that day they marched around the city seven times. And the seventh time, when the priests had blown the trumpets, Joshua said to the people, “Shout! For the LORD has given you the city.