24:43
Do not you see that Allah drives clouds then joins between them then makes them (into) a mass, then you see the rain come forth from their midst? And He sends down from (the) sky, [from] mountains within it [of] (is) hail and He strikes with it whom He wills and averts it from whom He wills. Nearly (the) flash (of) its lighting takes away the sight.

8:37
That may distinguish Allah the wicked from the good, and place the wicked some of them on others and heap them all together, and put them in Hell. Those - they (are) the losers.

52:44
And if they were to see a portion from the sky falling, they will say, "Clouds heaped up."