Al-Kahf · 18:18

18. You - O one who looks at them - will think they are awake, because their eyes are open, though in actual fact they are asleep. I turn them over in their sleep, sometimes to the right and sometimes to the left, so that the earth does not consume their bodies. Their dog that accompanied them stretches out its forelegs at the entrance of the cave. If you had come across them and seen them, you would have turned and run away being afraid of them, and your soul would have been filled with fear of them.