﴿ وَسُيِّرَتِ ٱلْجِبَالُ فَكَانَتْ سَرَابًا ﴾

“and when the mountains are made to vanish as if they had been a mirage.”

and the mountains are set in motion dislocated from their positions and become as a mirage as fine dust that is to say like it in terms of its levity when in motion.