Surah Al-Qalam — Ayah 19 (68:19)
فَطَافَ عَلَيۡهَا طَآئِفٞ مِّن رَّبِّكَ وَهُمۡ نَآئِمُونَ ١٩
English translation (Saheeh International)
So there came upon it [i.e., the garden] an affliction from your Lord while they were asleep.
Brief commentary
So I sent a fire to the garden which consumed it while its owners were asleep, unable to defend it.