Quran 18:41 from Surah Al-Kahf on Divine Marvels.
أَوۡ يُصۡبِحَ مَآؤُهَا غَوۡرٗا فَلَن تَسۡتَطِيعَ لَهُۥ طَلَبٗا
English translation: Or will become its water sunken so never you will be able to find it to find it
Transliteration: aw yus'biha mauha ghawran falan tastati'a lahu talaban