﴿ يَوْمَ يَتَذَكَّرُ ٱلْإِنسَٰنُ مَا سَعَىٰ ﴾

“on that Day man will [clearly] remember all that he has ever wrought;”

(The day when man will call to mind) when the disbeliever, al-Nadr Ibn al-Harith and his host, will remember and know (his (whole) endeavour) the works he did in his state of disbelief,