Hajjaj bin al-Minhal حجاج بن المنهال · The Book of Financial Transactions

"Two trades have the choice as long as until they reach a deal that suits both of them and they confirm it three times. "

there was a man whose mental faculties were lacking, and he used to buy and sell. His family came to the Prophet and said: "O Prophet of Allah stop him." So the Prophet of Allah called him, and told him not to do that. He said: "O Prophet of Allah, I cannot bear to be away from business," He said "If you engaged in a deal then say: 'There is no intention to deceive. "' (Sahih )

Munabadhah and Mulamasha. And he said that Mulamasah means when one man says to another: "I will sell you my garment for your garment," and neither of them looks at the garment of the others, rather he just touches it. And Munabadhah is when he says: "I will throw what I have and you throw what you have," so that they buy from one another, and neither of them knows how much the other has, and so on.

the Messenger of Allah granted a concession regarding 'Araya sales regarding dried dates and fresh dates.

the Messenger of Allah granted a concession allowing Araya sales by estimation.

"I heard the Messenger of Allah say: 'Gold, equal amount."' (One of the narrators) Yaqub did not mention: "Equal amount." Muawiyah said: "This does not mean anything." 'Ubadah said; "By Allah I do not care if I am in a land where Muawiyah is not present. I bear witness that I heard the Messenger of Allah say that."

"Makhrafah Al-Abdi and I brought some cloth from Hajar, and the Messenger of Allah came to us while we were in Mina where there w a man who weighed (goods) in return for payment. He bought some trousers from us, and said to the man who weighed: 'Weigh it, and allow more."'

"I was with the Messenger of Allah on a journey, and I was riding a camel. He said: 'Why are you at the back of the people?, I said: 'My camel is tired, He took hold of its tail and shouted at it, then I was at the front of the people, worrying that it would go ahead of the others. When we drew close to al-Madinah he said: 'What happened to the camel? Sell it to me.' I said,…

a man from among the Ansar who was called Abu (Madhkur) stated that a slave of his who was called Ya'qub was to be set free after he died, and he did not own any other property apart from him. The Messenger of Allah called for him (the slave) to be brought and he said: "Who will buy him?" Nu'aim bin 'Abdullah bought him for eight hundred dirhams, and he gave it to him and said: "If one of you…

the Messenger of Allah forbade selling water.