Quran 18:10 — The Cave (Al-Kahf)

When the youths took refuge in the cave, they said, "Our Lord, shower us with Your mercy, and bless our affairs with Your guidance."

[18:9] Why else do you think we are telling you about the people of the cave, and the numbers connected with them? They are among our wondrous signs.

[18:11] We then sealed their ears in the cave for a predetermined number of years.