Ashes
The deeds of those who reject their Lord are like ashes scattered by the wind on a stormy day, no power to reclaim what was lost. That is the farthest straying.
14:18A similitude of those who disbelieve in their Lord: Their works are as ashes which the wind bloweth hard upon a stormy day. They have no control of aught that they have earned. That is the extreme failure.