﴿ وَبُسَّتِ ٱلْجِبَالُ بَسًّۭا ﴾

“and the mountains are shattered into [countless] shards,”

(And the hills are ground to powder) and it is also said: and the hills are made to move like the passing of the clouds; and it is also said that this means: when the hills are uprooted from their spots.