Joshua 6:13-15

And the seven priests bearing the seven trumpets of rams’ horns before the ark of the LORD walked on, and they blew the trumpets continually. And the armed men were walking before them, and the rear guard was walking after the ark of the LORD, while the trumpets blew continually. And the second day they marched around the city once, and returned into the camp. So they did for six days. On the seventh day they rose early, at the dawn of day, and marched around the city in the same manner seven times. It was only on that day that they marched around the city seven times.