39لَو يَعلَمُ الَّذينَ كَفَروا حينَ لا يَكُفّونَ عَن وُجوهِهِمُ النّارَ وَلا عَن ظُهورِهِم وَلا هُم يُنصَرونَMir AneesuddinHad those who do not believe but known the time when they will not be able to stop the fire from their faces and from their backs and they will not be helped (they would not have asked you such a question).