يَوْمَ يَكُونُ النَّاسُ كَالْفَرَاشِ الْمَبْثُوثِ
On the day people will resemble scattered moths. (101:4)
Yawma is a time adverb. Grammarians explain its attachment to the occurrence of al-qāriʿah or to an implied governing expression. Rhetorically, the previously magnified event is now unfolded through an identifiable scene.
Al-nāsu is the subject of yakūnu, while the simile phrase functions as its predicate. A universal human state is made imaginable through a familiar visual comparison.