Say [unto those who deny the truth]: "What do you think? If of a sudden all your water were to vanish underground, who [but God] could provide you with water from [new] unsullied springs?"

Say: "See ye?- If your stream be some morning lost (in the underground earth), who then can supply you with clear-flowing water?"

Say: Have ye thought: If (all) your water were to disappear into the earth, who then could bring you gushing water?

Say: Have you considered if your water should subside, who is it then that will bring you flowing water?

Say, "Have you considered: if your water was to become sunken [into the earth], then who could bring you flowing water?"