Joshua 7:2-3

2Joshua sent some men to go from Jericho to Ai. That is a city near to Beth Aven, and east of Bethel. He said to the men, ‘Go up and look at the land near there secretly.’ So the men went to Ai to see what they could discover.

3The men came back and they said to Joshua, ‘There are not many men in Ai. Do not send our whole army to attack it. 2,000 or 3,000 men will be enough to take the city.’