24. This is a parenthetical clause which has been inserted here because of its relevancy to the preceding verse, in which it was asserted that the correct number of the sleepers of the cave is known only to Allah and a research into it is a useless task. Therefore one should refrain from investigating into unimportant things, nor enter into discussions about them. This has led to the instruction contained in the parenthetical clause for the benefit of the Prophet (peace be upon him) and the believers who have been told never to make a positive assertion like this: I will do this thing tomorrow, for you do not know whether you will be able to do that thing or not: you have neither the knowledge of the unknown nor have full powers to do what you like. If ever inadvertently you utter anything like this, you should at once remember your Lord and say, InshaAllah. Besides this you do not know whether there will be any good for you in the thing about which you say: I will do this. It is possible that you may do another thing better than that. Therefore you should trust in God and say: I hope that my Lord will guide me in this matter with that thing which is nearer to the right way for me.