Ash-Shu'ara' - 26:189

فَكَذَّبُوهُ فَأَخَذَهُمْ عَذَابُ يَوْمِ الظُّلَّةِ إِنَّهُ كَانَ عَذَابَ يَوْمٍ عَظِيمٍ
[26:189]
But they called him a liar, so the punishment of the day of covering overtook them; surely it was the punishment of a grievous day.
But they rejected him. Then the punishment of a day of overshadowing gloom seized them, and that was the Penalty of a Great Day.
But they denied him, so there came on them the retribution of the day of gloom. Lo! it was the retribution of an awful day.