Fassarar Ma'anoni Aya 11 Sura Suratu Al'kahf - الترجمة الإنجليزية - يعقوب - Kundin Alqurani Mai girma

Aya: 11

فَضَرَبۡنَا عَلَىٰٓ ءَاذَانِهِمۡ فِي ٱلۡكَهۡفِ سِنِينَ عَدَدٗا

11. So We drew (a veil) over their ears⁹ (and caused them to sleep) in the cave for a number of years.

9. Their ears are specifically mentioned because the sense of hearing above and beyond any other sense is the one that spoils sleep most. If done in perfect circumstances, rarely is sleep disturbed by a cause other than noise.