Judges 9:51 in the World English Bible
But there was a strong tower within the city, and all the men and women of the city fled there, and shut themselves in, and went up to the roof of the tower.
Context
50 Then went Abimelech to Thebez, and encamped against Thebez, and took it.
51 But there was a strong tower within the city, and thither fled all the men and women, and all they of the city, and shut it to them, and gat them up to the top of the tower.
52 And Abimelech came unto the tower, and fought against it, and went hard unto the door of the tower to burn it with fire.