Yazid bin Abi Habib يزيد بن أبي حبيب · The Chapters on Business Transactions

"We went out with the Messenger of Allah (ﷺ) and the people were trading early in the morning. He called them: 'O merchants!' and when they looked up and craned their necks, he said : 'The merchants will be raised on the Day of Resurrection as immoral people, apart from those who fear Allah and act righteously and speak the truth (i.e. those who are honest)."'

"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."'

"The Messenger of Allah (ﷺ) used to accept the invitation of a slave."