Abdullah bin 'Amr al-'As, reported Allah's Messenger ( صلی اللہ علیہ وسلم ) 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 round it) are like stars in the sky; and he who would drink from it would never feel thirsty after that.