Al-Kahf 18:21 وكذالك اعثرنا عليهم ليعلموا ان وعد الله حق وان الساعة لا ريب فيها اذ يتنازعون بينهم امرهم فقالوا ابنوا عليهم بنيانا ربهم اعلم بهم قال الذين غلبوا على امرهم لنتخذن عليهم مسجدا ٢١

And in this way, We made them known to the people (of the city), so that they realize that Allah’s promise is true, and that there is no doubt about the Hour (the Day of Resurrection). When they were disputing among themselves in their matter, they said, “Erect a building over them. Their Lord knows them best.” Said those who prevailed in their matter, “We will certainly make a mosque over them.”