Sahih al-Bukhari 2124
صحيح البخاري#2124SahihNarrated Nafi`:Ibn `Umar told us that the people used to buy food from the caravans in the lifetime of the Prophet. The Prophet (ﷺ) used to forbid them to sell it at the very place where they had purchased it (but they were to wait) till they carried it to the market where foodstuff was sold. Ibn `Umar said, 'The Prophet (ﷺ) also forbade the reselling of foodstuff by somebody who had bought it unless he had received it with exact full measure
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: 34:76