Joshua 7:1-3

1But the children of Israel committed unfaithfulness in that which had been brought under the curse: Achan, the son of Carmi, the son of Zabdi, the son of Zerah, of the tribe of Judah, took of the accursed thing; and the anger of Jehovah was kindled against the children of Israel.

2And 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. And the men went up and spied out Ai.

3And they returned to Joshua, and said to him, Let not all the people go up; let about two or three thousand men go up and smite Ai; make not all the people to toil thither, for they are few.