Judges 1:16-18

16 The descendants of the Kenite, Moses' father-in-law, came up with the Judahites from the city of palms to the desert at Arad (which is in the Negeb). But they later left and settled among the Amalekites.

17 Judah then went with his brother Simeon, and they defeated the Canaanites who dwelt in Zephath. After having doomed the city to destruction, they renamed it Hormah.

18 Judah, however, did not occupy Gaza with its territory, Ashkelon with its territory, or Ekron with its territory.