Ma'mar bin Rashid معمر بن راشد · The Book of Financial Transactions

"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."

" The Messenger of Allah ruled that what a slave earns belongs to his guarantor."

the Prophet forbade a town-dweller to sell for a desert- dweller, even if he was his father or brother. (Sahih )

the Messenger of Allah forbade artificially inflating prices, meeting traders on the way, and for a town-dweller to sell for a desert-dweller." (Sahih )

the Prophet forbade artificially inflating prices.

"When the Prophet (ﷺ) came to Al-Madinah, he called for a scale and weighed (something) for me and gave me more."

"I heard the Prophet say" something similar to the preceding two reports "until he takes possession of it."

"A slave came and gave his pledge to the Messenger of Allah to emigrate, and the Prophet did not realize that he was a slave. Then his master came looking for him. The Prophet said; 'Sell him to me.' So he bought him for two black slaves, then he did not accept until he had asked; 'Is he a slave?'''

"The Messenger of Allah said: 'If one of you is referred to a rich man (to help repay a debt), he should accept that referral, and (wrongdoing) is when a rich man takes a long time to repay a debt."'

"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…

"The Messenger of Allah said: 'Whoever sets free his share of a slave, and he has sufficient wealth to set him free completely by paying the price of the slave, then he should set him free with his own wealth."'