Abu Salama bin 'Abdur Rahman أبو سلمة بن عبد الرحمن بن عوف · The Book of Financial Transactions

"Do not go out to meet the riders, and do not urge someone to cancel a sale he has already agreed upon os as to sell him your own goods, do not artificially inflate prices, and let not a town-dweller sell for a desert-dweller." (Sahih )

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

"The Messenger of Allah was asked about (buying) fresh dates with dried dates, and he said to those who were around him: 'Will fresh dates decrease (in weight or volume) when they dry out?" they said Yes,' so he forbade that."

"The Messenger of Allah was asked about (buying) said; 'Will fresh dates decrees (in weight or volume) when they dry out? 'They said 'yes so he forbade that"

"I saw people being beaten (in punishment) at the time of the Messenger of Allah for buying food unmeasured and selling it before bringing it to their own camp."

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

"The Prophet borrowed forty thousand from me, then some wealth came to him, and he paid me back and said: 'May Allah bless your family and your wealth for you: the reward for lending is praise and repayment."

"There was a man who never did any good deed, but he used to lend to people and he would say to this messenger: "Take what can be paid easily and leave what is difficult, let them off, and perhaps Allah, the Mighty and Sublime, said to him: 'Did you ever do any good did? He said: No, but I had a slave and I used to lend to people. When I sent him to collect the debts I said…

"Sa'd, 'Ammar and I entered into a partnership on the Day of Badr, (agreeing to share) whatever was allotted to us. 'Ammar and I did not get anything. But sa'd got two prisoners."

"Whoever sets free his share of a slave should set him free completely from his own wealth, if he has enough wealth to cover the price of the slave."