Hashaym bin Bashayr bin al-Qasim هشيم بن بشير بن القاسم · The Book of Financial Transactions

The Messenger of Allah said: "The two parties to a transaction have the choice so long as they have not separated. If they are honest and open, their transaction will be blessed, but if they tell lies and conceal anything the blessing of their transaction will be lost."

"The messenger of Allah said: 'Gold for gold, of equal measure; silver for silver, of equal measure; salt for salt, dates for dates wheat for wheat, barley for barley, like for like. Whoever gives more or takes more has engaged in Riba."' (Sahih) The wording is that of Muhammad Yaqub did not mention - "Wheat for wheat".

"I bought some food and made food and made a profit on it (by selling it) before I took possession of it. I came to the Messenger of Allah and told him about that and he said: 'Do not sell it until you take possession of it."'

"The Messenger of Allah forbade charging stud fees for a stallion."