Sura 18 Al-Kahf (The Cave), aya 11

1. فَضَرَبْنَا عَلَىٰ آذَانِهِمْ فِي الْكَهْفِ سِنِينَ عَدَدًا

   So We cast (a cover of sleep) over their ears within the cave for a number of years.

   18:11

Tafsiri: Saheeh International