Narrated Jabir (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) cursed the one who accepts usury, the one who gives it, the one who records it and the two witnesses to it, saying, "They are all the same." [Reported by Muslim] . al-Bukhari reported something similar from the Hadith of Abu Juhaifah.

Narrated 'Abdullah bin Mas'ud (RA): The Prophet ( صلی اللہ علیہ وسلم ) said: "Usury has seventy-three categories, the least one in sin is as that of a man who marries (has sexual relations with) his mother, and the very essence of usury is the (violation of the) honor of a Muslim man." [Ibn Majah reported it in a short form and al-Hakim in a complete one. The latter also graded it Sahih (authentic)] .

Narrated Abu Sa'id al-Khudri (RA): The Prophet ( صلی اللہ علیہ وسلم ) said: "Do not sell gold for gold unless it is the same amount for the same amount, and do not make one amount greater than the other. Do not sell silver for silver unless it is the same amount for the same amount, and do not make one amount greater than the other. And do not sell that (cash money) which is not present (at the time of the transaction) for that (cash money) which is present." [Agreed upon] .

Narrated 'Ubadah bin as-Samit (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) said: "Gold is to be paid for with gold, silver with silver, wheat with wheat, barley with barley, dates with dates, and salt with salt, same quantity for same quantity and equal for equal, hand to hand (i.e. payment being made on the spot). If these classes differ, sell as you wish as long as payment is made on the spot." [Reported by Muslim] .

Narrated Abu Hurairah (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) said: "Gold is to be paid for with gold, both being of equal weight and of same quantities; silver is to be paid for with silver, both being of equal weight and of same quantities. If anyone gives more or asks for more of it, it is then usury." [Reported by Muslim] .

Narrated Abu Sa'id al-Khudri and Abu Hurairah (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) appointed a man over Khaibar and he brought him dates of a very fine quality. Allah's Messenger ( صلی اللہ علیہ وسلم ) asked, "Are all the dates of Khaibar like this?" He replied, "I swear by Allah that they are certainly not, O Allah's Messenger. We take one Sa' of this kind for two, and even for three (of lesser quality). So Allah's Messenger ( صلی اللہ علیہ وسلم ) said: "Do not do so. Sell the mixed dates for Dirhams, then buy the very fine dates with the Dirhams." And he said that the same applies when things are sold by weight. [Agreed upon] . Muslim has: "and so is (that which is sold by) weight."

Narrated Jabir bin 'Abdullah (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) forbade selling a quantity of dates whose measure was unknown for a specified (known) quantity of dates. [Reported by Muslim] .

Narrated Ma'mar bin 'Abdullah (RA): I used to hear Allah's Messenger ( صلی اللہ علیہ وسلم ) say, "Food (may be sold) for food, of same quantities." Our food at that time consisted of barley. [Reported by Muslim] .

Narrated Fadala bin 'Ubaid (RA): I bought a necklace for twelve Dinars at the battle of Khaibar and it contained gold and gems. I considered them separately and found that it was worth more than twelve Dinars. I told the Prophet ( صلی اللہ علیہ وسلم ) about that and he said, "It must not be sold till the contents are considered separately." [Reported by Muslim] .

Narrated Samura bin Jundub (RA): The Prophet ( صلی اللہ علیہ وسلم ) forbade selling animals for animals when payment was to be made at a later date. [Reported by al-Khamsah. Ibn al-Jarud and at-Tirmidhi graded it Sahih (authentic)] .