Shu'aib bin Muhammad bin 'Abdullah شعيب بن محمد بن عبد الله بن عمرو · The Book of Financial Transactions

"I heard Nafi narrating from Ibn 'Umar, form the Messenger of Allah 'the two parties to a transaction both have the choice so long as they have not separated unless they have chosen to conclude the transaction. " Nafi said: ''When 'Abdullah bought something he like, he would leave straightaway."

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

"Ata' told me that from 'Abdullah bin 'Ismah Al-Jushami from Hakim bin Hizam from the prophet. "

"I lent a young camel to the Messenger of Allah, and I came to ask him to repay me. He said: 'Yes, I will only repay you with a superior she-camel.' so he repaid me and repaid me well. Then a Bedouin came to him to ask to repay him a camel of a certain age, and the Messenger of Allah said: 'Give him a camel of certain age.' On that day they gave him a mature camel and he…

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?'''