Shaykh Abu Ash'ath narrates: He was present in the sermon of Sayyiduna Ubadah bin Samit (may Allah be pleased with him), he narrates: I heard him stating that the Prophet Muhammad (peace and blessings be upon him) said: "Gold is to be sold for gold, but only equal in weight, and silver for silver, but only equal in weight, whether it is in its original form or in the form of coins. Then he commanded the sale of barley for barley, wheat for wheat, dates for dates, and salt for salt, and then he explained that there is no harm in exchanging wheat for barley, as long as it is hand to hand and there is an excess in one, but this transaction must be hand to hand. In any other case, whoever gives or takes more, he will be engaging in usury." The narrator named Abdullah states: I narrated this hadith to my father, and he considered it good.