Obedience and prostration before Allah

يَوْمَ يُكْشَفُ عَن سَاقٍ وَيُدْعَوْنَ إِلَى ٱلسُّجُودِ فَلَا يَسْتَطِيعُونَ

The Day the shin will be uncovered and they are invited to prostration but they [i.e., the disbelievers] will not be able,