Sahih al-Bukhari 2194
صحيح البخاري#2194SahihNarrated `Abdullah bin `Umar:Allah's Messenger (ﷺ) forbade the sale of fruits till their benefit is evident. He forbade both the seller and the buyer (such sale)
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: 34:141