Quran 18:19 — The Cave (Al-Kahf)

When we resurrected them, they asked each other, "How long have you been here?" "We have been here one day or part of the day," they answered. "Your Lord knows best how long we stayed here, so let us send one of us with this money to the city. Let him fetch the cleanest food, and buy some for us. Let him keep a low profile, and attract no attention.

[18:18] You would think that they were awake, when they were in fact asleep. We turned them to the right side and the left side, while their dog stretched his arms in their midst. Had you looked at them, you would have fled from them, stricken with terror.

[18:20] "If they discover you, they will stone you, or force you to revert to their religion, then you can never succeed."