Surah Ar-Ra'd 13:12

هُوَ ٱلَّذِى يُرِيكُمُ ٱلْبَرْقَ خَوْفًا وَطَمَعًا وَيُنشِئُ ٱلسَّحَابَ ٱلثِّقَالَ

It is He who shows you lightning, [causing] fear and aspiration, and generates the heavy clouds.

Translation: Saheeh International

Tafsir

He it is Who shows you the lightning inspiring fear in travellers of thunderbolts and hope for those who are at home of rain; and He produces He creates the clouds that are heavy with rain.

Excerpt from Tafsir al-Jalalayn, commentary on 13:12, via Quran.com. The reader has the full commentary and 9 more tafsirs.