﴿ هَٰذَا يَوْمُ ٱلْفَصْلِ ۖ جَمَعْنَٰكُمْ وَٱلْأَوَّلِينَ ﴾

“that Day of Distinction [between the true and the false, when they will be told]: "We have brought you together with those [sinners] of olden times;”

When a man is confronted with the horrors of the Hereafter, he will find himself helpless. At that time, those who were wont to speak as if their vocabulary was inexhaustible, will be rendered speechless.