Sayyiduna Jabir bin Abdullah (may Allah be pleased with both of them) narrates that the Messenger of Allah (peace and blessings be upon him) cursed the one who consumes usury, the one who gives it, the one who writes it down, and both of its witnesses, and said: "They are all equal (in sin)."

Abu Huraira (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Usury has seventy parts (of sin), and the lightest of them in the sight of Allah is equal to the sin of a person who marries his own mother."

Abu Sa'id al-Khudri (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Silver for silver and gold for gold must be equal in amount. Whoever gives more or takes more has engaged in usury; both the giver and the taker are equal (in sin)."

Abu Sa'id al-Khudri (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: "Do not sell gold for gold unless it is equal on both sides; do not allow any deficiency or excess on either side. Do not sell silver for silver unless it is equal on both sides; do not allow any deficiency or excess on either side. And do not sell on credit for cash."

Sayyiduna Ubadah bin Samit (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Gold for gold, silver for silver, dates for dates, wheat for wheat, barley for barley, and salt for salt must be equal in amount and hand to hand. If these types differ, then sell as you wish, provided it is hand to hand (on the spot)."

Sayyiduna Umar bin Khattab (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said:“If gold is exchanged for gold and it is not hand to hand, then it is usury; if dates are exchanged for dates and it is not hand to hand, then it is usury; if wheat is exchanged for wheat and it is not hand to hand, then it is usury; if barley is exchanged for barley and it is not hand to hand, then it is usury.”

Sayyiduna Ubadah bin Samit (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Gold for gold should be equal for equal, and silver for silver should be equal for equal, until he made a special mention of salt as well." Sayyiduna Ubadah (may Allah be pleased with him) says: "By Allah! I do not care whether I am in the region of Muawiyah or not." Marwan says: "Both narrators gave it special importance that I should mention salt."

Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates that during the time of the Messenger of Allah (peace and blessings be upon him), we were given inferior dates to eat, so we used to give two sa's (of inferior dates) and take one sa' (of good dates). When this matter reached the Messenger of Allah (peace and blessings be upon him), he said: "It is not permissible to give two sa's in exchange for one sa', nor is it permissible to give two dirhams in exchange for one dirham."

Sayyiduna Fadala bin Ubaid Ansari (may Allah be pleased with him) narrates that at Khaybar, a necklace was presented to the Messenger of Allah (peace and blessings be upon him), which had gold and gems set in it. That necklace had come as war booty and was being sold. The Messenger of Allah (peace and blessings be upon him) ordered that the gold set in the necklace be separated, so it was separated. Then the Messenger of Allah (peace and blessings be upon him) said to them: "Gold can be sold for gold in equal weight."

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that I used to sell camels in Baqi’. I would fix the price in dinars and receive payment in dirhams, and likewise, I would fix the price in dirhams and receive payment in dinars. I went to the Messenger of Allah (peace and blessings of Allah be upon him) while he was in the house of Lady Hafsa (may Allah be pleased with her), and I said:“O Messenger of Allah! Please wait, I want to ask you about an issue. I sell camels in Baqi’, I fix the price in dinars and receive payment in dirhams, and likewise, I fix the price in dirhams and receive payment in dinars.”He (peace and blessings of Allah be upon him) said:“There is no harm in this, provided that you take the current price of that day and receive the full payment before you separate (i.e., do not leave any ambiguity).”