John Wesley on Jeremiah 25:20

Of Uz - Some part of Arabia Petraea, near to Idumaea. Of the Philistines - Uzzah, Ekron, Ashdod, and Askelon, were four of their cities, the fifth which was Gath is not here named. For before this time it was destroyed, either by Psammeticus, father to Pharaoh Necho, or by Tartan, captain general to Sargon, king of Assyria, of whom read, Isa 20:1, that he took Ashdod, which may be the reason that here mention is made of no more than the remnant of Ashdod.