Amos 1:6-8

Thus saith Jehovah: For three transgressions of Gaza, yea, for four, I will not turn away the punishment thereof; because they carried away captive the whole people, to deliver them up to Edom. But I will send a fire on the wall of Gaza, and it shall devour the palaces thereof. And I will cut off the inhabitant from Ashdod, and him that holdeth the sceptre from Ashkelon; and I will turn my hand against Ekron; and the remnant of the Philistines shall perish, saith the Lord Jehovah.