Sahih al-Bukhari 6962
صحيح البخاري#6962SahihNarrated Abu Huraira:Allah's Messenger (ﷺ) 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 90:9