Allah's Messenger (ﷺ) forbade the sale of Muzabana, i.e. selling of fruits for fruits, except in the case of 'Araya; he allowed the owners of 'Araya such kind of sale.
Sahih al-Bukhari Book 42, Hadith 31
← Previous Hadith The Prophet (ﷺ) allowed the sale of the dates of the 'Araya for ready dates by estimating the former which should be estimated as less than five Awsuq or five Awsuq. (Dawud, the sub-narrator is not sure as to the right amount.)

Sahih al-Bukhari Book 42, Hadith 30 Next Hadith → While I was in the company of the Prophet (ﷺ) in one of his Ghazawat, he asked, "What is wrong with your camel? Will you sell it?" I replied in the affirmative and sold it to him. When he reached Medina, I took the camel to him in the morning and he paid me its price.

Sahih al-Bukhari Book 43, Hadith 1