Joshua 7:2-3

2Now Joshua sent men from Jericho to Ai, which is near Beth-aven, east of Bethel, and spoke to them saying: “Go up and spy out the land.” So the men went up and spied out Ai.

3When they returned to Joshua, they reported to him: “Let not all the people go up—only about two or three thousand men need go up and strike Ai, so don’t wear out all the people there, for they are just a few.”