18:41
أَوْ يُصْبِحَ مَآؤُهَا غَوْرًا فَلَن تَسْتَطِيعَ لَهُۥ طَلَبًا
aw yuṣ'biḥa māuhā ghawran falan tastaṭīʿa lahu ṭalaban
or its water may sink so deep into the ground that you will never be able to reach it again.’
"Or the water thereof (of the gardens) becomes deep-sunken (underground) so that you will never be able to seek it."