Joshua 8:24-25

24And it came to pass when Israel had ended slaying all the inhabitants of Ai in the field, in the wilderness wherein they had chased them, and they had all fallen by the edge of the sword, until they were consumed, that all Israel returned to Ai, and smote it with the edge of the sword.

25And so it was, that all who fell that day, men as well as women, were twelve thousand, all the people of Ai.