Do you not see that Allāh drives clouds? Then He brings them together; then He makes them into a mass, and you see the rain emerge from within it. And He sends down from the sky, mountains [of clouds] within which is hail, and He strikes with it whom He wills and averts it from whom He wills. The flash of its lightning almost takes away the eyesight.
O Messenger! Do you not know that Allah drives the clouds, then joins parts of them together, then makes them into layers, one above the other. You then see the rain coming out from the cloud, and falling from the sky from parts of cloud like mountains, falling as hail. That hail reaches whoever Allah wills from His servants, and He turns it away from whomsoever He wills. It is extremely possible that the light from bolts of lightning blinds the eyesight.