The Prophet ﷺ said, "While a man was in an open desert, he heard a voice from a cloud saying, 'Water the garden of so-and-so.' That cloud then moved aside and poured its water onto a stretch of stony ground, and one of the streams there absorbed all of that water. He followed the water and found a man standing in his garden, directing the water with his shovel.He said to him, 'Servant of Allah, what is your name?'The man replied, 'So-and-so,' giving the very name he had heard from the cloud.The man then said to him, 'Servant of Allah, why do you ask my name?'He answered, 'I heard a voice in the cloud whose water this is, saying, Water the garden of so-and-so, mentioning your name. What do you do with this garden?'He said, 'Since you have asked, I look at what it produces and give a third in charity, my family and I eat a third, and I return a third back into it.'"
عن النبي ﷺ قال: بينا رجل بفلاة من الأرض فسمع صوتا في سحابة: اسق حديقة فلان، فتنحى ذلك السحاب فأفرغ ماءه في حرة فإذا شرجة من تلك الشراج قد استوعبت ذلك الماء كله، فتتبع الماء فإذا رجل قائم في حديقته يحول الماء بمسحاته فقال له: يا عبد الله ما اسمك؟ قال: فلان للاسم الذي سمع في السحابة. فقال له: يا عبد الله، لم تسألني عن اسمي؟ فقال: إني سمعت صوتا في السحاب الذي هذا ماؤه يقول: اسق حديقة فلان لاسمك، فما تصنع فيها؟ قال: أما إذ قلت هذا فإني أنظر إلى ما يخرج منها فأتصدق بثلثه، واكل أنا وعيالي ثلنا، وأرد فيها ثلثه.
Muslim narrated it in Zuhd (2984) through several routes from Yazid bin Harun, who said, Abdul-Aziz bin Abu Salama narrated to us, from Wahb bin Kaysan, from Ubayd bin Umayr Laythi, from Abu Hurairah, and he mentioned it.In another narration also found in Muslim, it reads, "and I set aside a third of it for the poor, the beggars, and the traveler in need."