Yahya bin Qais Mazni says: I asked Imam Ata whether, when trading dinar for dinar and dirham for dirham, there can be any increase or decrease. He said: Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) considered it permissible. Sayyiduna Ibn Zubair (may Allah be pleased with them both) said: Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates matters which he did not himself hear from the Messenger of Allah (peace and blessings be upon him). When this reached him, he said: Indeed, I did not myself hear this hadith from the Messenger of Allah (peace and blessings be upon him), but Sayyiduna Usama bin Zaid (may Allah be pleased with them both) narrated to me that the Messenger of Allah (peace and blessings be upon him) said that there is no usury except in credit.

Abu Salih says: When I heard Abu Saeed saying that gold for gold should be equal, I met Sayyiduna Ibn Abbas (may Allah be pleased with them both) and said to him: What is your opinion about what you say, have you found this thing in the Noble Qur'an or heard it from the Messenger of Allah (peace and blessings be upon him)? He said: This is not something that I have found in the Book of Allah or heard from the Messenger of Allah (peace and blessings be upon him), rather Sayyiduna Usamah bin Zaid (may Allah be pleased with them both) informed me that the Messenger of Allah (peace and blessings be upon him) said that usury is in credit.

Dhakwan says: Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) sent me to Sayyiduna Ibn Abbas (may Allah be pleased with them both) and said: Ask him about the transaction of sarf (exchange of gold and silver), whether you have heard any hadith from the Messenger of Allah (peace and blessings be upon him) which we have not heard, or have you read anything in the Book of Allah which we have not read? He replied: I do not narrate any such hadith. The matter is that Sayyiduna Usama bin Zaid (may Allah be pleased with them both) has narrated that the Messenger of Allah (peace and blessings be upon him) said: There is no usury except in credit.

Sulaiman bin Ali Rabee says: Abu Juza’ has narrated to us many times, he says: I asked Sayyiduna Ibn Abbas (may Allah be pleased with them both) about the exchange sale (bay’ sarf), he said: There is no harm if it is two for one, or more, or less. When I went for Hajj the next time, this elder was still alive, I came to him and asked again about the exchange sale. He said: It should be equal in weight. I said: You gave me the fatwa that it can be two for one, and I have been giving this fatwa since then? He said: That was my opinion, now Sayyiduna Abu Saeed Khudri (may Allah be pleased with him) has narrated to me (that this is usury), so I have abandoned my opinion because of this hadith of the Messenger of Allah (peace and blessings be upon him).

It is narrated from Sayyiduna Fadala bin Ubaid (may Allah be pleased with him) that a necklace was brought to the Noble Prophet (peace and blessings be upon him), which contained gold and pearls, and it was for sale, and it had been obtained from the spoils of war. The Prophet (peace and blessings be upon him) ordered that the gold in the necklace be separated, then said: Gold is to be sold for gold in equal amounts.

It is also narrated from Sayyiduna Fadala bin Ubaid, may Allah be pleased with him, who says: On the day of Khaybar, I bought a necklace for twelve dinars, which contained gold and pearls. When I separated them, the gold alone turned out to be worth more than twelve dinars. When I informed the Noble Prophet, peace and blessings be upon him, of this, he said: Do not sell it until it has been separated.

It is also narrated from Sayyiduna Fadala bin Ubaid, may Allah be pleased with him, he says: We were with the Messenger of Allah, peace and blessings be upon him, on the day of the conquest of Khaybar. The Jews sold an uqiyyah of gold in exchange for two or three dinars, but the Messenger of Allah, peace and blessings be upon him, said: Do not sell gold for gold except that it is equal for equal.

It is narrated from Sayyiduna Abdullah bin Mughaffal (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) forbade breaking the currency in circulation among the Muslims, except in case of necessity.

It is narrated from Sayyiduna Ma'mar bin Abdullah 'Adawi (may Allah be pleased with him) that he sent a slave to take one sa’ of wheat, sell it first, and then buy barley in exchange for it. So the slave went and brought back more than one sa’ of barley. When he came to Sayyiduna Ma'mar (may Allah be pleased with him) and informed him about the transaction, he asked: Did you really do it this way? Go back and return this transaction, and take only equal for equal in exchange, because I heard the Messenger of Allah (peace and blessings be upon him) say that when selling grain for grain, it must be equal for equal. At that time, our food was barley. Someone said: But these are not of the same kind. However, Sayyiduna Ma'mar (may Allah be pleased with him) said: I fear that it may resemble it (i.e., riba/usury).

Abu Dahana narrates: He says, I was sitting with Sayyiduna Abdullah bin Umar (may Allah be pleased with him), and he said that a guest came to the Messenger of Allah (peace and blessings be upon him). He said to Sayyiduna Bilal (may Allah be pleased with him): Bring food for us. So he went and gave two sa’ of dates and in exchange took one sa’ of good dates, as their own dates were of inferior quality. The Prophet (peace and blessings be upon him) liked these dates very much. So he (peace and blessings be upon him) asked: Where did these dates come from? Sayyiduna Bilal (may Allah be pleased with him) said: He took one sa’ of these dates in exchange for two sa’ of ours. The Messenger of Allah (peace and blessings be upon him) said: Return our dates.