Do you not see that Allah 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 lightening almost takes away the eyesight. An-Nur 24:43 ⧉
Tafsir:
مِنَ السَّمَاءِ مِن جِبَالٍ فِيهَا
From the sky mountains (of clouds) having hail in them - 43.
Here the word سَمَاء is purported for clouds, and Jibal جِبَالٍ (mountains) for big masses of clouds, while hails are called Barad.