What did the Prophet Muhammad (saw) forbid in terms of the sale of Muzabana, and for what type of sale did he allow an exception?
 Narrated Rafi` 'bin Khadij and Sahl bin Abi Hathma:                     Allah's Apostle 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.