Ayoub al-Sakhtiyani أيوب السختياني · 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 )

"Beware of taking oaths a great deal when selling, for it may help you to make a sale but it destroys the blessing."

"Abdullah bin Dinr narrated to us, from Ibn'Umar, who said; 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."

"I heard Jabir bin 'Abdullah (narrate) from the Prophet that he forbade Mukhabarah, Muzabanah and Muhaqalah, an (he forbade) selling fruits until their condition is known, an that they should only sold for Dinars and Dirhams, but he granted a concession regarding the sale of Araya:

It was narrated from Au Hurairah that the prophet granted a concession allowing estimation for 'Ararya sales, so long as they were five Wasq or less then that

"The Messenger of Allah said: "Do not sell food until you have bought it and taken possession of it."'

"The Messenger of Allah said: 'No man is bound by a transaction involving the sale of something that he does not possess.'''

"I asked the Prophet "O Messenger of Allah, a man may come to me and ask me to sell him something that I do not have. Can I sell it to him then go and buy it from the market?' He said: 'Do not sell what you do not have.'''

the Messenger of Allah forbade selling animals in exchange for animal's ion credit.

"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 Prophet forbade selling the offspring of the offspring of a pregnant animal (Habal Al-Habalah)

she wanted to buy Barirah to set her free, but they stipulated that her loyalty (should be to them. She mentioned that to the Messenger of Allah and the Messenger of Allah said: "Buy her, and wet her free and loyalty (Wala) belongs to the one who sets the slave free." Some meat was brought to the Messenger of and it was said that this had been given in charity to Bariirah. He said: "It is charity for her, and…

"The Messenger of Allah bought some food from a Jew on credit, and he gave him a shield of his as a pledge. "

"The Messenger of Allah said: 'if one who can afford it delay repayment, his honor and punishment become permissible."'