(Al-Kahf) 18 : 11
فَضَرَبْنَا عَلَىٰ آذَانِهِمْ فِي الْكَهْفِ سِنِينَ عَدَدًا
Then We made them sleep in the cave over their ears for a number of years.
Lord Allah made the youths to sleep sidewise for a number of years.