Joshua 8:25
Twelve thousand men and women of Ai were killed that day.
Deuteronomy 20:16-18
Do not spare anyone's life in the cities of these nations Jehovah your God is giving you as your property.
Treasury of Scripture Knowledge
Summary
And so it was, that all that fell that day, both of men and women, were twelve thousand, even all the men of Ai.
General references
Bible References
General references
Numbers 31:15
Moses asked them: Have you spared all the women?