It was narrated that 'Ubadah bin As-Samit said:
The messenger of Allah said: 'Gold for gold, of equal measure; silver for silver, of equal measure; salt for salt, dates for dates wheat for wheat, barley for barley, like for like. Whoever gives more or takes more has engaged in Riba. ' (Sahih) The wording is that of Muhammad Yaqub did not mention - Wheat for wheat .