Yazid bin Harun يزيد بن هارون · The Book on Business

That the Prophet (ﷺ) said: "Whoever purchased an animal that has not been milked, then he the choice when he milks it, if he wishes he may return it, returning a Sa' of dried dates along with it." There are narration on this topic from Anas, and a man from the Companions of the Prophet (ﷺ).

"The Messenger of Allah (ﷺ) gave me on Dinar to purchase a sheep for him. So I purchased two sheeps for him, and I sold one of them for a Dinar. So I returned with the sheep and the Dinar to the Prophet (ﷺ), and I mentioned what had happened and he said: 'May Allah bless you in your business dealings.' After that we went to Kunasah in Al-Kufah, and he made tremendous profits. He was among the wealthiest of…