Abdullah bin 'Amr bin al-'Aas · The Chapters on Business Transactions

the Prophet (ﷺ) was treated with cupping and he gave him (the cupper) his wages. (Sahih)Ibn Abu 'Umar was alone in narrating it. That was said by Ibn Majah.

"The Messenger of Allah (ﷺ) forbade Gharar transaction sand Hasah transactions. "

a man from among the Ansar came to the Prophet (ﷺ) and begged from him. He said, "Do you have anything in your house?" He said: "Yes, a blanket, part of which we cover ourselves with and part we spread beneath us, and a bowl from which we drink water." He said: "Givethem to me." So he brought them to him, and the Messenger of Allah (ﷺ) took them in his hand and said, "Who will by these two things?"…

"I heard 'Umar say: "The Messenger of Allah (ﷺ), said: 'Gold for silver is usury, unless it is exchanged on the spot."' (Sahih) Abu Bakr bin Abu-Shaibah said: "I heard sufyan saying: 'Gold for silver." memorize (this).