Al-Kahf 11

فَضَرَبْنَا عَلَىٰٓ ءَاذَانِهِمْ فِى ٱلْكَهْفِ سِنِينَ عَدَدًا ﴿١١﴾

Fadarabna AAala athanihim fee alkahfi sineena AAadadan

Therefore We covered up their (sense of) hearing (causing them, to go in deep sleep) in the Cave for a number of years. The Noble Quran