Quran 18:10 — The Cave (Al-Kahf)

إِذ أَوَى الفِتيَةُ إِلَى الكَهفِ فَقالوا رَبَّنا ءاتِنا مِن لَدُنكَ رَحمَةً وَهَيِّئ لَنا مِن أَمرِنا رَشَدًا

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.