Joshua 8:2-4

Darby Translation

² And 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.

³ And Joshua arose, and all the people of war, to go up to Ai. And Joshua chose thirty thousand valiant men, and sent them away by night.

⁴ And he commanded them, saying, See, ye shall be in ambush against the city, behind the city: go not very far from the city, and be all of you ready.