Joshua 7:2-3

2Now Joshua sent men from Jericho to Ai, which is beside Beth Aven, on the east side of Bethel, and spoke to them, saying, “Go up and spy out the country.” So the men went up and spied out Ai.

3And they returned to Joshua and said to him, “Do not let all the people go up, but let about two or three thousand men go up and attack Ai. Do not weary all the people there, for the people of Ai are few.”