That was because their messengers were coming to them with clear proofs, but they disbelieved, so Allāh seized them. Indeed, He is Powerful and severe in punishment.
That punishment which befell them only befell them because their messengers used to come to them with clear proof and evident miracles, but they disbelieved in Allah and denied His messengers. Allah seized them, despite their strength, and destroyed them. He is Powerful, severe in punishing those who disbelieve in Him and deny His messengers.