You would have thought they were awake, though they lay asleep. We turned them over, to the right and the left, while their dog lay at the cave's entrance with legs outstretched. Had you looked down and seen them, you would have surely turned your back and fled in terror. 18 And so, [in the course of time,] We awakened them; and they began to ask one another [as to what had happened to them]. One of them asked: "How long have you remained thus?" [The others] answered: "We have remained thus a day, or part of a day." Said they [who were endowed with deeper insight]: "Your Sustainer knows best how long you have thus remained. Let, then, one of you go with these silver coins to the town, and let him find out what food is purest there, and bring you thereof [some] provisions. But let him behave with great care and by no means make anyone aware of you: 19 For they, if they should come to know of you, will stone you or turn you back to their religion; then ye will never prosper. 20 And thus did We make (men) to get knowledge of them that they might know that Allah's promise is true and that as for the hour there is no doubt about it. When they disputed among themselves about their affair and said: Erect an edifice over them-- their Lord best knows them. Those who prevailed in their affair said: We will certainly raise a masjid over them. 21 Anon they will say: they were three the fourth of them their dog. And they will say: they were five, the sixth of them their dog - guessing at the unknown - and they will say: they were seven, the eighth of them their dog. Say thou: my Lord is the Best Knower of their number; there knew them only a few; so debate thou not regarding them except an outward debating, and ask not regarding them anyone of them. 22