Al-Kahf 41

أَوْ يُصْبِحَ مَآؤُهَا غَوْرًا فَلَن تَسْتَطِيعَ لَهُۥ طَلَبًا ﴿٤١﴾

Aw yusbiha maoha ghawran falan tastateeAAa lahu talaban

"Or the water thereof (of the gardens) becomes deep-sunken (underground) so that you will never be able to seek it." The Noble Quran