Sa'id bin Abi Sa'id · The Book of Financial Transactions

"There are three at whom Allah will not look on the Day of Resurrection, nor will He sanctify them, and theirs will be a painful torment: the one who does not give anything but he reminds (the recipient of his gift), the one who drags his Izar (below the ankles), and the one who sells his product by means of false oaths." (Sahih )

"The Messenger of Allah said: 'When two people meet to engage in trade, the transaction between them is not binding until they separate, unless they have chosen to conclude the transaction.,'"

"No one of you should urge someone to cancel a sale he has already agreed upon with his brother so as to sell him his own goods."

"The Messenger of Allah forbade two kinds of transactions: Mulamash and Munabddhah "

"The Messenger of Allah granted a concession allowing 'Araya sales by estimate."