Abdullah bin Wahb عبد الله بن وهب بن مسلم القرشي · Commercial Transactions (Kitab Al-Buyu)

On the authority of his father: I heard the Messenger of Allah (ﷺ) say in the Farewell Pilgrimage: "Lo, all claims to usury of the pre-Islamic period have been abolished. You shall have your capital sums, deal not unjustly and you shall not be dealt with unjustly. Lo, all claims for blood-vengeance belonging to the pre-Islamic period have been abolished. The first of those murdered among us whose blood-vengeance I remit is al-Harith ibn AbdulMuttalib, who suckled among Banu Layth…

The Messenger of Allah (ﷺ) addressed us and said: Is here any one of such and such tribe present? But no one replied. He again asked: Is here any one of such and such tribe present? But no one replied. He again asked: Is here any one of such and such tribe? Then a man stood and said: I am (here), Messenger of Allah. He said: What prevented you from replying the first two times? I wish to tell you…

The Prophet (ﷺ) forbade the sale of fruits on the tree for fruits by measure, and sale of grapes for raisins by measure, and sale of harvest for wheat by measure.

The Messenger of Allah (ﷺ) gave license regarding the sale of 'araya when the amount was less then five wasqs or five wasqs. Dawud b. al-Husain was doubtful. Abu Dawud said: The tradition by Jabir indicates up to four wasqs.