﴿ يَوْمَ يُكْشَفُ عَن سَاقٍۢ وَيُدْعَوْنَ إِلَى ٱلسُّجُودِ فَلَا يَسْتَطِيعُونَ ﴾

“on the Day when man's very being shall be bared to the bone, and when they [who now deny the truth] shall be called upon to prostrate themselves [before God], and shall be unable to do so:”

Mention the day when the shank is bared an expression denoting the severity of the predicament during the reckoning and the requital on the Day of Resurrection one says kashafati’l-harbu ‘an sāqin ‘the war has bared its shank’ to mean that it has intensified and they are summoned to prostrate themselves as a test of their faith but they will not be able to do so — their backs will become as stiff as a brick wall.