يَوْمَ يُكْشَفُ عَن سَاقٍ وَيُدْعَوْنَ إِلَى السُّجُودِ فَلَا يَسْتَطِيعُونَ (42)
(68:42) On the Day when the dreadful calamity will unfold, *24 when people will be summoned to prostrate themselves, and yet they will not be able to prostrate.
*24) Literally: "The Day the shin shall be uncovered". A section of the Companions and their successors says that these words have been used idiomatically, for according to Arabic idiom, kashf-i saq implies befalling of an affliction. Hadrat `Abdullah bin 'Abbas also has given this same meaning of this and has supported it by evidence from Arabic poetry. According to another saying that has been cited from Ibn 'Abbas and Rabi' bin Anas, kashf-i saq implies uncovering the facts and truths. In view of this interpretation, the meaning would be: "The Day when all truths shall be bared and the people's deeds shall become open and manifest. "