So We cast [a cover of sleep] over their ears within the cave for a number of years.
The Saheeh International Quran Translation
فَضَرَبْنَا عَلَىٰٓ ءَاذَانِهِمْ فِى ٱلْكَهْفِ سِنِينَ عَدَدًاSo We cast [a cover of sleep] over their ears within the cave for a number of years.