67:30 qul ara-aytum in aSbaHa maaukum gawran famay ya'tiykum bimaaim ma'Iyn

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Ahmed Raza Khan: Mohammed Aqib Qadri:
Say, "What is your opinion - if in the morning all your water were to sink into the earth, then who is such who can bring you water flowing before you?"

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

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