Al-Kahf · 18:21

21. Just as I did those wondrous acts, of putting them to sleep and awakening them after many years, indicating My Power, I caused them to be discovered by the people of their city, so that those people would know that the promise of Allah to help the believers and of resurrection is true, and that the rising is coming without doubt. After the matter of the people of the cave was exposed and they had passed away, those who discovered them differed: What should they do with regard to them? One group said: Build over the entrance of the cave a building that will serve as a barrier and will preserve them. Their Lord knows best about their condition and their condition requires that they have some special status in His sight. The influential people who did not have knowledge or a proper call said: I will set up over them a place of worship in their honour and as a memoir of their location.