Translation of the verse 39 from Surah Ad-Dukhan : Number of verses 59 - - page 497 - Part 25.
We created them not except with truth (i.e. to examine and test those who are obedient and those who are disobedient and then reward the obedient ones and punish the disobedient ones), but most of them know not.
We did not create them except in truth, but most of them do not know.
(44:39) We did not create them except in Truth. But most of them do not know. *34
*34) This is the second answer to their objection; it means: "Whoever denies life-after-death and the rewards and punishments of the hereafter, in fact, regards this world as a plaything and its Creator as a foolish child. This is why he has formed the view that tnan, after raising aII sorts of the storms in the world, will end up in the dust one day and none of his good or bad acts will bear any fruit. The fact, however, is that this universe is the creation of an AlI-Wise Creator and not of a frivolous being, and it cannot be expected from an AlI-Wise Creator that he would perform a useless and vain act." (For a detailed explanation, see AI-An'am: 73, Yunus: 5-6, Al-Anbiya: 16-18, AI-Mu'minun: 115, Ar-Rum: 8-9 and the corresponding E.N.'s).
Source : Ad-Dukhan Verse 39: We did not create them except in truth, but most of them do not know.