"Dug over, a town in the Shephelah or low hills of Judah (Josh." "15:35), where the five confederated Amoritish kings were" defeated by Joshua and their army destroyed by a hailstrom "(10:10, 11). It was one of the places re-occupied by the Jews on" their return from the Captivity (Neh. 11:30).

See where Azekah occurs in the Bible...

Definition of Azekah:
"strength of walls"