‏البيوع : Hadeeth No:3712 Jabir b. Abdullah (Allaah be pleased with them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) forbidding Muhaqala and Muzabana and Mu'awama and Mukhabara. (One of the narrators) 'said: Sale years ahead is Mu'awama, and making exceptional but he made an exemption of araya....

‏البيوع : Hadeeth No:3866 Fadala b. 'Ubaid reported: We were in the company of Allaah's Messenger ( sallAllaahu alayhi wa sallam) on the day (of the Victory of) Khaibar, and made transaction with the Jews for the 'uqiya of gold for the dinars or three (gold coins), whereupon Allaah's Messenger (sallAllaahu alayhi wa sallam) ...