Ata ibn Yasar عطاء بن يسار أبو محمد مولى ميمونة · The Book of Financial Transactions

"Ubadah bin As-Samit and Muawiyah met at a stopping place on the road. 'Ubadah said: 'The Messenger of Allah forbade us to sell gold for gold, silver for silver, wheat for wheat, barley for barley, dates for dates"' - one of them said: "salt for salt, " but the other did not say "unless it was equal amount for equal amount, like for like." One of them said: "Whoever gives more or takes more has engaged in Riba," but the…

they used to buy foold from the riders at the time of the Messenger of Allah and he forbade them to sell it in the place where they had bought it until they moved it to the food market.