Sahih al-Bukhari 2181
صحيح البخاري#2181SahihNarrated Abu Al-Minhal:I asked Al-Bara' bin `Azib and Zaid bin Arqam about money exchanges. Each of them said, "This is better than I," and both of them said, "Allah's Messenger (ﷺ) forbade the selling of silver for gold on credit
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: 34:129