Translation:

5. But the Thamud they were destroyed by a terrible storm of thunder and lightning!

Notes (Tafseer)

5638. The Thamud were addicted to class arrogance. They oppressed the poor. The prophet Salih preached to them, and put forward a wonderful she-camel as symbol of the rights of the poor, but they ham-strung her. See n. 1044 to vii. 73. They were destroyed in a mighty calamity, an earthquake accompanying a terrible thunderstorm.