42يَومَ يُكشَفُ عَن ساقٍ وَيُدعَونَ إِلَى السُّجودِ فَلا يَستَطيعونَMuhammad Asadon the Day when man's very being shall be bared to the bone,1 and when they [who now deny the truth] shall be called upon to prostrate themselves [before God],2 and shall be unable to do so:Lit., "when the shin[-bone] shall be bared": i.e., when man's innermost thoughts, feelings and motivations will be laid bare. The implication is that their erstwhile claim that whatever is "expedient" is morally justifiable (see note 19 above), shall be revealed in all its nakedness - namely, as something indefensible and spiritually destructive.I.e., willingly, gladly humbling themselves before Him.