Narrated Abdullah ibn Umar: The Prophet (ﷺ) said: (The standard) weight is the weight of the people of Mecca, and the (standard) measure is the measure of the people of Medina. Abu Dawud said: Al-Firyabi and Abu Ahmad have also transmitted from Sufyan in a similar way, and he (Ibn Dukain) agreed with them on the text. The version of Abu Ahmad has: "from Ibn 'Abbas" instead of Ibn 'Umar. It has also been transmitted by al-Walid b. Muslim from Hanzalah. This version has: "the weight of Medina and the measure of Mecca." Abu Dawud said: There is a variation in the text of the version of this tradition narrated by Malik b. Dinar from 'Ata' from the Prophet (ﷺ).

Narrated Samurah: The Messenger of Allah (ﷺ) addressed us and said: Is here any one of such and such tribe present? But no one replied. He again asked: Is here any one of such and such tribe present? But no one replied. He again asked: Is here any one of such and such tribe? Then a man stood and said: I am (here), Messenger of Allah. He said: What prevented you from replying the first two times? I wish to tell you something good. Your companion has been detained (from entering Paradise) on account of his debt. Then I saw him that he paid off all his debt on his behalf and there remained no one to demand from him anything. Abu Dawud said: The name of the narrator Sam'an is Sam'an b. Mushannaj.

Narrated AbuMusa al-Ash'ari: The Prophet (ﷺ) said: After the grave sins which Allah has prohibited the greatest sin is that a man dies while he has debt due from him and does not leave anything to pay it off, and meets Him with it.

Narrated Jabir ibn Abdullah: The Messenger of Allah (ﷺ) would not say funeral prayer over a person who died while the debt was due from him. A dead Muslim was brought to him and he asked: Is there any debt due from him? They (the people) said: Yes, two dirhams. He said: Pray yourselves over your companion. Then AbuQatadah al-Ansari said: I shall pay them, Messenger of Allah. The Messenger of Allah (ﷺ) then prayed over him. When Allah granted conquests to the Messenger of Allah (ﷺ), he said: I am nearer to every believer than himself, so if anyone (dies and) leaves a debt, I shall be responsible for paying it; and if anyone leaves property, it goes to his heirs.

A similar tradition has also been transmitted by Ibn 'Abbas though a different chain of narrators. This version says: "He (the Prophet) purchased a calf from a caravan, but he had no money with him. He then sold it with some profit and gave the profit in charity to the poor and widows of Banu 'Abd al-Muttalib. He then said: I shall not buy anything after this but only when I have money with me.

Narrated Abu Hurairah: The Messenger of Allah (ﷺ) as saying: Delay in payment (of debt) by a rich man is injunctive, but when one of you is referred to a wealthy man, he should accept the reference.

Narrated Abu Rafi': The Messenger of Allah (ﷺ) borrowed a young camel, and when the camels of the sadaqah (alms) came to him, he ordered me to pay the man his young camel. I said: I find only an excellent camel in its seventh year. So the Prophet (ﷺ) said: Give it to him, for the best person is he who discharges his debt in the best manner.

Narrated Jabir ibn Abdullah: The Prophet (ﷺ) owed me a debt and gave me something extra when he paid it.

Narrated 'Umar: The Messenger of Allah (ﷺ) as saying: Gold for gold is interest unless both hand over on the spot ; wheat for wheat is interest unless both hand over on the spot ; dates for dates is interest unless both hand over on the spot ; barley for barley is interest unless both hand over on the spot.

Narrated Ubadah ibn as-Samit: The Messenger of Allah (ﷺ) said: Gold is to be paid for with gold, raw and coined, silver with silver, raw and coined (in equal weight), wheat with wheat in equal measure, barley with barley in equal measure, dates with dates in equal measure, salt by salt with equal measure; if anyone gives more or asks more, he has dealt in usury. But there is no harm in selling gold for silver and silver (for gold), in unequal weight, payment being made on the spot. Do not sell them if they are to be paid for later. There is no harm in selling wheat for barley and barley (for wheat) in unequal measure, payment being made on the spot. If the payment is to be made later, then do not sell them. Abu Dawud said: This tradition has also been transmitted by Sa'id b. Abi 'Arubah, Hisham al-Dastawa'i and Qatadah from Muslim b. Yasar through his chain.

Narrated Fudalah ibn Ubayd: The Prophet (ﷺ) was brought a necklace in which there were gold and pearls. (The narrators AbuBakr and (Ahmad) Ibn Mani' said: The pearls were set with gold in it, and a man bought it for nine or seven dinars.) The Prophet (ﷺ) said: (It must not be sold) till the contents are considered separately. The narrator said: He returned it till the contents were considered separately. The narrator Ibn Asa said: By this I intended trade. Abu Dawud said: The word hijarah (stone) was recorded in his note-book before, but he changed it and narrated tijarah (trade).

Narrated Fudalah bin 'Ubaid: At the battle of Khaibar I bought a necklace in which there were gold and pearls for twelve dinars. I separated them and found that its worth was more than twelve dinars. So I mentioned that to the Prophet (ﷺ) who said: It must not be sold till the contents are considered separately.

Narrated Fudalah bin 'Ubaid: We were with the Messenger of Allah (ﷺ) at the battle of Khaibar. We were selling to the Jews one uqiyah of gold for one dinar. The narrators other than Qutaibah said: "for two or three dinars." Then both the versions agreed. The Messenger of Allah (ﷺ) said: Do not sell gold except with equal weight.

Narrated Abdullah ibn Umar: I used to sell camels at al-Baqi for dinars and take dirhams for them, and sell for dirhams and take dinars for them. I would take these for these and give these for these. I went to the Messenger of Allah (ﷺ) who was in the house of Hafsah. I said: Messenger of Allah , take it easy, I shall ask you (a question): I sell camels at al-Baqi'. I sell (them) for dinars and take dirhams and I sell for dirhams and take dinars. I take these for these, and give these for these. The Messenger of Allah (ﷺ) then said: There is no harm in taking them at the current rate so long as you do not separate leaving something to be settled.

The tradition mentioned above has also been transmitted by Simak (b. Harb) with a different chain of narrators and to the same effect. The first version is more perfect. It does not mention the words "at the current rate".

Narrated Samurah (ibn Jundub): The Prophet (ﷺ) forbade selling animals for animals when payment was to be made at a later date.

Narrated Abdullah ibn Amr ibn al-'As: The Messenger of Allah (ﷺ) commanded him to equip an army, but the camels were insufficient. So he commanded him to keep back the young camels of sadaqah, and he was taking a camel to be replaced by two when the camels of sadaqah came.

Narrated Jabir: The Prophet (ﷺ) bought a slave for two slaves.

Zayd Abu 'Ayyash asked Sa'd ibn Abi Waqqas about the sale of the soft and white kind of wheat for barley. Sa'd said: Which of them is better? He replied: Soft and white kind of wheat. So he forbade him from it and said: I heard the Messenger of Allah (sawa) say, when he was asked about buying dry dates for fresh. The Messenger of Allah (sawa) said: Are fresh dates diminished when they become dry? The (the people) replied: Yes. So the Messenger of Allah (ﷺ) forbade that. Abu Dawud said: A similar tradition has also been transmitted by Isma'il b. Umayyah.

Narrated Sa'd ibn Abi Waqqas: The Messenger of Allah (ﷺ) forbade to sell fresh dates for dry dates when payment is made at a later date. Abu Dawud said: The tradition mentioned above has also been transmitted by Sa'd (b. Abi Waqqas) from the Prophet (ﷺ) through a different chain of narrators in a similar way.