On the second day they marched around the city once and returned to the camp. They did this for six days.
Joshua 6:14 In-Context
Joshua got up early the next morning and the priests took up the ark of the LORD.
The seven priests carrying the seven trumpets went forward, marching before the ark of the LORD and blowing the trumpets. The armed men went ahead of them and the rear guard followed the ark of the LORD, while the trumpets kept sounding.
So on the second day they marched around the city once and returned to the camp. They did this for six days.
On the seventh day, they got up at daybreak and marched around the city seven times in the same manner, except that on that day they circled the city seven times.
The seventh time around, when the priests sounded the trumpet blast, Joshua commanded the army, “Shout! For the LORD has given you the city!