Yazid bin Harun يزيد بن هارون · The Chapters on Business Transactions

when the Messenger of Allah (ﷺ) sent him to Makkah, he forbade him from profiting off of what he did not possess.

"Whoever sells a palm tree and sells a slave." Mentioning both of them together.

"The Messenger of Allah (ﷺ) said: 'Whoever buys food, let him not sell it until he has taken full possession of it.'" (Sahih) In his narration, (one of the narrators) Abu 'Awanah said: "Ibn 'Abbas said: 'I think everything is like food."'

"O Allah, bless my nation early in the morning.' "

“The Prophet used to give us dates from the collection (mixed) The Messenger of Allah said: ‘It is not right to give one Sa of dates for two Sa, nor one Dirham for two Dirham. A Dirham for a Dirham and a Dinar for a Dinar is allowed: the only difference between them is in weight (i.e., the weight must be equal.)’” Sahih

'The Messenger of Allah (ﷺ) said: 'Dinar for Dinar, Dirham for Dirham, with no increase between them. Whoever has need of silver, let him trade gold for it, and whoever has need of gold, let him trade silver for it, and let the transaction be done on the spot."'