(Some) say they were three (youths), the dog being the fourth among them; And (others) say they were five, the dog being the sixth— Doubtfully guessing the unknown; And (yet others) say they were seven, the dog being the eighth. (O Prophet!) You say (to them): "My Lord knows best their number; It is only a few who know their (real number)." Therefore, do not enter into disputes about them, except about a matter that is clear, nor speak to any of them about (the affair of) the people of the Cave.