`Abdullah b. `Amr al-`As, reported Allah's Messenger (ﷺ) as saying
My Cistern (is as wide and broad that it requires) a month's journey (to go round it) all , and its sides are equal and its water is whiter than silver , and its odour is more fragrant than the fragrance of musk , and its jugs (placed around it) are like stars in the sky ; and he who would drink from it would never feel thirsty after that.