And thou shalt do to Ai and her king as thou didst to Jericho
 and her king
 Burn the one and slay the other: 
 only the spoil thereof, and the cattle thereof, shall ye take for a
 prey unto yourselves;
 which they were not allowed to do at Jericho: 
 lay thee an ambush for the city behind it;
 at the west side of it: some have called in question the lawfulness of the ambush, but, as this was appointed by the Lord, there is no room for it.