Muhammad bin al-Muthna - al-Zaman محمد بن المثنى أبو موسى - الزمن · The Book of Financial Transactions

"The two parties to a transaction have the choicer so long as they have not separated, unless they reach an agreement before parting, and it is not permissible to hasten to leave for fear that the other party may change his mind."

some dates from trees that were irrigated artificially were brought to the Messenger of Allah and the dates of the messenger of Allah were dates from trees that were nourished by their roots. He said: "Where did you get these from?" They said: "We bought a Sa of them for two Sa s of our dates: He said: "Do not do that, for this is not right. Rather sell your dates and but what you need of these,"

"I used to sell gold for silver, or silver for gold. I came to the Messenger of Allah and told him about that, and he said: 'If you make a deal with your companion, d o not leave him when there is still any ambiguity (in the deal) between you."'

"Paying in advance for the offspring of the offspring of a pregnant animal (Habal al-Habalah) is Riba''

if a man becomes bankrupt, then a specific item is found with him, and is recognized, then it belongs to the one who sold it to him.