Surah Al-Ahqaf 46:24

فَلَمَّا رَأَوْهُ عَارِضًا مُّسْتَقْبِلَ أَوْدِيَتِهِمْ قَالُوا۟ هَـٰذَا عَارِضٌ مُّمْطِرُنَا ۚ بَلْ هُوَ مَا ٱسْتَعْجَلْتُم بِهِۦ ۖ رِيحٌ فِيهَا عَذَابٌ أَلِيمٌ

And when they saw it as a cloud approaching their valleys, they said, "This is a cloud bringing us rain!" Rather, it is that for which you were impatient: a wind, within it a painful punishment,

Translation: Saheeh International

Tafsir

Then when they saw it that is when they saw what chastisement really was as a sudden cloud a cloud that appeared out of nowhere on the horizon heading towards their valleys they said ‘This is a cloud that will bring us rain!’. …

Excerpt from Tafsir al-Jalalayn, commentary on 46:24, via Quran.com. The reader has the full commentary and 9 more tafsirs.