'Once' in the Bible

Now you shall march around the city, all the men of war circling the city once. You shall do this [once each day] for six days.

So Joshua had the ark of the Lord taken around the city [on the first day], circling it once; then they came back into the camp and spent the night in the camp.

On the second day they marched around the city once, and returned to the camp; they did this for six days.