فَكَذَّبُوهُ فَأَخَذَهُمْ عَذَابُ يَوْمِ ٱلظُّلَّةِ إِنَّهُۥ كَانَ عَذَابَ يَوْمٍ عَظِيمٍ
Saheeh International(189) 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.
English Translation - Rowwad Translation CenterThus they rejected him, so they were seized by the punishment of the cloudy day; it was the punishment of a horrible day.
English Translation - Hilali and Khan189. But they belied him, so the torment of the day of shadow (a gloomy cloud) seized them. Indeed that was the torment of a Great Day.