Narrated 'Abdullah (ra) said, I heard the Messenger of Allah (ﷺ) say "If somebody buys date-palms after they have been pollinated, the fruits will belong to the seller unless the buyer stipulates the contrary. If somebody buys a slave having some property, the property will belong to the seller unless the buyer stipulate that it should belong to him."
Narrated Zaid bin Thabit
The Prophet (ﷺ) permitted selling the dates of the 'Araya for ready dates by estimating the amount of the former (as they are still on the trees).
Narrated Jabir bin `Abdullah
The Prophet (ﷺ) forbade the sales called Al-Mukhabara, Al-Muhaqala and Al-Muzabana and the selling of fruits till they are free from blights. He forbade the selling of the fruits except for money, except the 'Araya.
Narrated Abu Huraira
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.)
Narrated Rafi` 'bin Khadij and Sahl bin Abi Hathma
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.