Joshua 6:13-15
And seven priests bearing seven trumpets of rams' horns before the ark
of the Lord went on continually, and blew with the trumpets: and the
armed men went before them; but the rereward came after the ark of the
Lord, the priests going on, and blowing with the trumpets.
And the second day they compassed the city once, and returned into the camp: so they did six days.
And
it came to pass on the seventh day, that they rose early about the
dawning of the day, and compassed the city after the same manner seven
times: only on that day they compassed the city seven times.