18:11
فَضَرَبْنَا عَلَىٰٓ ءَاذَانِهِمْ فِى ٱلْكَهْفِ سِنِينَ عَدَدًا
faḍarabnā ʿalā ādhānihim fī l-kahfi sinīna ʿadadan
So We cast [a cover of sleep] over their ears within the cave for a number of years.
— Saheeh International
We sealed their ears [with sleep] in the cave for years.
— M. A. S. Abdel Haleem
Therefore We covered up their (sense of) hearing (causing them to go in deep sleep) in the Cave for a number of years.
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali