﴿ وَجِا۟ىٓءَ يَوْمَئِذٍۭ بِجَهَنَّمَ ۚ يَوْمَئِذٍۢ يَتَذَكَّرُ ٱلْإِنسَٰنُ وَأَنَّىٰ لَهُ ٱلذِّكْرَىٰ ﴾

“And on that Day hell will be brought [within sight]; on that Day man will remember [all that he did and failed to do]: but what will that remembrance avail him?”

and Hell on that day is brought near pulled by seventy thousand sets of reins each set of reins pulled by the hands of seventy thousand angels as it groans and seethes in fury; on that day yawma’idhin is a substitution for idhā ‘when’ the response to which is the following man that is to say the disbeliever will remember his prodigal conduct in it but how will remembering avail him now? the interrogative is meant as a denial in other words his remembering that will not be of any use to him.