Sahih al-Bukhari 2354
صحيح البخاري#2354SahihNarrated Abu Huraira:that Allah's Messenger (ﷺ) said, "Do not withhold the superfluous water in order to withhold the superfluous 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: 42:4