26:189
فَكَذَّبُوهُ فَأَخَذَهُمْ عَذَابُ يَوْمِ ٱلظُّلَّةِ ۚ إِنَّهُۥ كَانَ عَذَابَ يَوْمٍ عَظِيمٍ
And they denied him, so the punishment of the day of the black cloud seized them. Indeed, it was the punishment of a terrible day.
The Poets
فَكَذَّبُوهُ فَأَخَذَهُمْ عَذَابُ يَوْمِ ٱلظُّلَّةِ ۚ إِنَّهُۥ كَانَ عَذَابَ يَوْمٍ عَظِيمٍ
And they denied him, so the punishment of the day of the black cloud seized them. Indeed, it was the punishment of a terrible day.
Nearby ayahs help place verse 26:189 in sequence and meaning.
فَأَسْقِطْ عَلَيْنَا كِسَفًا مِّنَ ٱلسَّمَآءِ إِن كُنتَ مِنَ ٱلصَّـٰدِقِينَ
So cause to fall upon us fragments of the sky, if you should be of the truthful."
قَالَ رَبِّىٓ أَعْلَمُ بِمَا تَعْمَلُونَ
He said, "My Lord is most knowing of what you do."
إِنَّ فِى ذَٰلِكَ لَـَٔايَةً ۖ وَمَا كَانَ أَكْثَرُهُم مُّؤْمِنِينَ
Indeed in that is a sign, but most of them were not to be believers.
وَإِنَّ رَبَّكَ لَهُوَ ٱلْعَزِيزُ ٱلرَّحِيمُ
And indeed, your Lord - He is the Exalted in Might, the Merciful.