Ash-Shu'ara 26:192

فَكَذَّبُوهُ فَأَخَذَهُمْ عَذَابُ يَوْمِ الظُّلَّةِ ۚ إِنَّهُ 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.

إِنَّ فِي ذَٰلِكَ لَآيَةً ۖ وَمَا كَانَ أَكْثَرُهُم مُّؤْمِنِينَ

Indeed in that is a sign, but most of them were not to be believers.

وَإِنَّ رَبَّكَ لَهُوَ الْعَزِيزُ الرَّحِيمُ

And indeed, your Lord - He is the Exalted in Might, the Merciful.

نَزَلَ بِهِ الرُّوحُ الْأَمِينُ

The Trustworthy Spirit has brought it down

عَلَىٰ قَلْبِكَ لِتَكُونَ مِنَ الْمُنذِرِينَ

Upon your heart, [O Muhammad] - that you may be of the warners -

بِلِسَانٍ عَرَبِيٍّ مُّبِينٍ

In a clear Arabic language.