Anas ibn Malik · The Book of Financial Transactions

"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.,'"

"The Messenger of Allah said;" Two traders have the choice as long as they have not separated, or until they reach a deal that suits both of th4em or that is satisfactory (to both)"

"The two parties to a transaction have the choicer so long as they have not separated, unless they reach an agreement before parting, and it is not permissible to hasten to leave for fear that the other party may change his mind."

a man told the Messenger of Allah that he was always being cheated. The Messenger of Allah said to him: "When you make a deal, say: There is no intention of cheating" So, whenever the man engages in a deal he says, 'There is no intention of cheating." "(Sahih )

the Messenger of Allah forbade meeting traders on the way.

"The Messenger of Allah forbade two kinds of garments, and he forbade two kinds of transactions for us: Munabadhah and Mulamasah, which are kinds of transactions which were common during the Jahiliyyah."

"The Messenger of Allah said: 'Whoever buys food let him not sell it until he takes possession of it. Ibn 'Abbas said: "I think the same applies to everything else as to food."

the Messenger of Allah forbade selling surplus water. The keeper of al-Wahat sold the surplus water of al-Wahat, and 'Abdullah bin 'Arm disapproved of that.