You might have thought them awake, though they were sleeping. We turned them about to the right and to the left, while their dog stretched its paws at the entrance. Had you seen them you would surely have become filled with terror and turned your back on them in flight. 18 Likewise, We roused them in a miraculous way that they might question one another. One of them asked: "How long did you remain (in this state)?" The others said: "We remained so for a day or part of a day." Then they said: "Your Lord knows better how long we remained in this state. Now send one of you to the city with this coin of yours and let him see who has the best food, and let him buy some provisions from there. Let him be cautious and not inform anyone of our whereabouts. 19 for, behold, if they should come to know of you, they might stone you to death or force you back to their faith - in which case you would never attain to any good!" 20 And even so We made them stumble upon them, that they might know that God's promise is true, and that the Hour -- there is no doubt of it. When they were contending among themselves of their affair then they said, 'Build over them a building; their Lord knows of them very well.' Said those who prevailed over their affair, 'We will raise over them a place of worship.' 21 Some will say: "They were three, and their dog was the fourth;" and some will also say: "They were five and their dog was the sixth," -- guessing in the dark. And some will even say: "They were seven, and their dog the eighth." Say: "My Lord alone knows best their number; none but only a few know of them." So do not argue about it with them but lightly, and do not enquire about them from any one of them. 22