al-Aswad bin Yazid الأسود بن يزيد بن قيس النخعي · The Book of Financial Transactions

"I heard Ibn 'Abbas say: 'As for that which the Messenger of Allah forbade, (it is) selling before taking possession of food."'

"The Messenger of Allah forbade two transactions in one."

"The Messenger of Allah caught up with me when I was riding a bad camel of ours, and I said: 'We have a bad camel, mare's the pit! The Prophet said: Will you sell it to me, O Jabir?' I Said, 'No, It is yours, O Messenger of Allah.; He said: 'O Allah forgive him; O Allah, have mercy on him. I will buy it for such and such, and I will lend it to you to ride until (we…