يَوْمَ لَا تَمْلِكُ نَفْسٌ لِنَفْسٍ شَيْئًا وَالْأَمْرُ يَوْمَئِذٍ لِلَّهِ
On that Day no soul will possess anything on behalf of another, and all authority will belong to God. (82:19)
The broad nouns “nafs ... li-nafs ... shayʾan,” within negation, produce a sweeping denial of independent human power. “Al-amr” is the subject of the nominal clause, “li-llāh” its predicate, and “yawmaʾidhin” specifies the time. The resulting exclusivity does not imply that divine authority is absent in the present world; rather, all competing pretensions to authority are exposed as worthless on that Day.
There are several syntactic accounts of the accusative “yawma.” One established analysis treats it as an adverb governed by an implied verb such as “yujzawn.” It should not be presented as indisputably a substitute (badal).