﴿ إِنَّ هَٰذَا مَا كُنتُم بِهِۦ تَمْتَرُونَ ﴾

“This is the very thing which you [deniers of the truth] were wont to call in question!””

(Lo! This) torment (is that whereof ye used to doubt) in the life of the world, deeming that it will never take place.