Judges 9:50-57. A Certain Woman.
Abimelech had already burned down one tower and came to Thebez to conquer they city and burn down the tower where all the men and women fled to with the leaders of the city. But a certain woman delivered the whole city by using an upper millstone, something used to grind grain. God can use anyone or anything to bring deliverance.
"Then Abimelech went to Thebez, and he camped against Thebez and captured it. But there was a strong tower in the center of the city, and all the men and women with all the leaders of the city fled there and shut themselves in; and they went up on the roof of the tower. So Abimelech came to the tower and fought against it, and approached the entrance of the tower to burn it with fire. But a certain woman threw an upper millstone on Abimelech’s head, crushing his skull. Then he called quickly to the young man, his armor bearer, and said to him, “Draw your sword and kill me, so that it will not be said of me, ‘A woman slew him.’” So the young man pierced him through, and he died. When the men of Israel saw that Abimelech was dead, each departed to his home. Thus God repaid the wickedness of Abimelech, which he had done to his father in killing his seventy brothers. Also God returned all the wickedness of the men of Shechem on their heads, and the curse of Jotham the son of Jerubbaal came upon them."
Judges 9:50-57 New American Standard Bible (NASB)