2 Chronicles 26:6

And he went forth and warred against the Philistines, and brake down the wall of Gath and the wall of Jabneh and the wall of Ashdod, three of their most important cities, the leading cities of three city-states, and built cities about Ashdod, in the country tributary to this city, and among the Philistines, the latter thus being practically in total subjection to Judah.