Surah An-Naml — Ayah 88 (27:88)

English translation (Saheeh International)

And you see the mountains, thinking them motionless,¹ while they will pass as the passing of clouds. [It is] the work of Allāh, who perfected all things. Indeed, He is Aware of that which you do.

1. - Or "solid and rigid."

Brief commentary

And you will see mountains on that day thinking them to be firm without moving, but they will in fact move like clouds move. It is the doing of Allah, for He is the one who makes them move. He is Aware of what you do. None of your actions are hidden from Him and He shall reward you for them.