Joshua 8:24-25

24And it came to pass, when Israel had finished slaying all the inhabitants of Ai in the field, in the wilderness in which they chased them, and when they had all fallen on the edge of the sword, until they were consumed, that all the Israelites returned to Ai, and smote it with the edge of the sword. 25And so it was, that all that fell that day, both of men and women, were twelve thousand, even all the men of Ai.