al-Zubair bin al-Kharrayt الزبير بن الخريت · The Book on Business

That there was a man who was not very sensible and he would make purchases. So his family came to the Prophet (ﷺ) and said: "O Messenger of Allah! Stop him (from making purchases)." So Allah's Prophet (ﷺ) called him to prohibit him, and he said: "O Messenger of Allah! I have no patience for business." So he said: "When you are buying, say: 'Hand to hand, and no cheating.'" There is a narration on this topic from Ibn 'Umar.…