Muhammad bin Rmh bin al-Mhajr محمد بن رمح بن المهاجر · The Chapters on Business Transactions

"The Messenger of Allah (ﷺ) was treated with cupping and he told me to give the cupper his wages."

"When the Prophet (ﷺ) came (to Al-Madinah), they used to pay in advance for dates, two or three years in advance. He said: 'Whoever pays in advance for dates, let him pay for a known amount or a known weight, to be delivered at a known time.’”

"The Messenger of Allah (ﷺ) said: 'There are three things in which there is blessing: A sale with deferred payment; Muqaradhah (profit sharing); and mixing wheat with barley for one's house, but not for sale."'