So there came upon the garden an affliction from your Lord while they were asleep.
The Saheeh International Quran Translation
فَطَافَ عَلَيْهَا طَآئِفٌ مِّن رَّبِّكَ وَهُمْ نَآئِمُونَSo there came upon the garden an affliction from your Lord while they were asleep.