Joshua 8:24-26

24When Israel had finished killing all the inhabitants of Ai in the field in the wilderness where they pursued them, and they had all fallen by the edge of the sword until they were destroyed, then all Israel returned to Ai and struck it with the edge of the sword.

25And all who fell that day, both men and women, were twelve thousand, all the people of Ai.

26For Joshua did not withdraw his hand with which he stretched out the spear until he had utterly destroyed all the inhabitants of Ai.