Joshua 8:1-2

1And Jehovah said to Joshua, Fear not, neither be dismayed. Take with thee all the people of war, and arise, go up to Ai. See, I have given into thy hand the king of Ai, and his people, and his city, and his land.

2And thou shalt do to Ai and to its king as thou didst to Jericho and to its king; only, the spoil thereof and the cattle thereof shall ye take as prey for yourselves. Set an ambush against the city behind it.