Quran 18:9 — The Cave (Al-Kahf)

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.

[18:8] Inevitably, we will wipe out everything on it, leaving it completely barren.*

[18:10] When the youths took refuge in the cave, they said, "Our Lord, shower us with Your mercy, and bless our affairs with Your guidance."