Narrated Ibn Mas'ud (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) said: "Do not buy the fish that is in the water, for it involves uncertainty (risk)." [Reported by Ahmad who indicated that the correct view is that it is Mawquf (saying of a Companion, i.e. Ibn Mas'ud] .

Narrated Ibn 'Abbas (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) forbade the selling of a fruit till it becomes ripe, or the selling of fur which is (still) on the back (of an animal) or milk which is (still) in the udder. [Reported by at-Tabarani in al-Awsat. ad-Daraqutni also reported it] . Abu Dawud reported in al-Marasil as a saying of 'Ikrimah, and that is the strongest opinion. He also reported it Mawquf (as a saying of a Companion, i.e.) Ibn 'Abbas with a strong chain of narrators, and al-Baihaqi held it to the most correct narration.

Narrated Abu Hurairah (RA): The Prophet ( صلی اللہ علیہ وسلم ) forbade the sale of what is in the womb of a she-camel, and the semen that is in the body of a male-camel. [Reported by al-Bazzar and there is weakness in its Isnad (chain of narrators)] .

Narrated [Abu Hurairah (RA)] : Allah's Messenger ( صلی اللہ علیہ وسلم ) said: "Whoever accepts back what he sold to a Muslim, Allah will forgive his fault." [Reported by Abu Dawud and Ibn Majah. Ibn Hibban and al-Hakim graded it Sahih (authentic)] .

Narrated Ibn 'Umar (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) said: "Both parties in a business transaction have a right to annul the transaction, so long as they have not separated and remain together; or one of them gives the other the choice (to conclude or annul the transaction); so, if one of them gives the other the choice (to conclude or annul the transaction) and then they make the transaction accordingly, the transaction then becomes binding; or if they separate after having made the transaction and none of them has annulled it, the transaction then becomes binding." [Agreed upon, and the wording is Muslim's] .

Narrated 'Amr bin Shu'aib on his father's authority from his grandfather (RA): The Prophet ( صلی اللہ علیہ وسلم ) said: "The two parties (seller and buyer) in a business transaction have a choice (to annul it) until they separated (from one another), unless it is a transaction with the right to annul it attached to it; and it is not allowed for one to separated from the other for fear that he may cancel the deal." [Reported by al-Khamsah except Ibn Majah. ad-Daraqutni, Ibn Khuzaimah and Ibn al-Jarud also reported it] . Another narration has: "till they separated from their place (of transaction)."

Narrated Ibn 'Umar (RA): A man told Allah's Messenger ( صلی اللہ علیہ وسلم ) that he was being deceived (cheated) in business transactions, and he replied, "When you make a purchase say, 'Deceiving (cheating) is not allowed (i.e. he has the choice to return the goods if he wills).'" [Agreed upon] .

Narrated Jabir (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) cursed the one who accepts usury, the one who gives it, the one who records it and the two witnesses to it, saying, "They are all the same." [Reported by Muslim] . al-Bukhari reported something similar from the Hadith of Abu Juhaifah.

Narrated 'Abdullah bin Mas'ud (RA): The Prophet ( صلی اللہ علیہ وسلم ) said: "Usury has seventy-three categories, the least one in sin is as that of a man who marries (has sexual relations with) his mother, and the very essence of usury is the (violation of the) honor of a Muslim man." [Ibn Majah reported it in a short form and al-Hakim in a complete one. The latter also graded it Sahih (authentic)] .

Narrated Abu Sa'id al-Khudri (RA): The Prophet ( صلی اللہ علیہ وسلم ) said: "Do not sell gold for gold unless it is the same amount for the same amount, and do not make one amount greater than the other. Do not sell silver for silver unless it is the same amount for the same amount, and do not make one amount greater than the other. And do not sell that (cash money) which is not present (at the time of the transaction) for that (cash money) which is present." [Agreed upon] .