Sahih Bukhari
Sahih Bukhari Volume 009, Book 086, Hadith Number 092.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 86. Tricks
Narrated By Abu Huraira : Allah's Apostle said, "One should not prevent others from watering their animals with the surplus of his water in order to prevent them from benefiting by the surplus of grass."