Read all Ahadith in commercial transactions (kitab al-buyu) by sunan abu dawood

Narrated Qays ibn Abu Gharazah: In the time of the Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم we used to be called brokers, but the Prophet صلی ‌اللہ ‌علیہ ‌وسلم came upon us one day, and called us by a better name than that, saying: O company of merchants, unprofitable speech and swearing takes place in business dealings, so mix it with sadaqah (alms).

The tradition mentioned above has also been transmitted by Qais bin Abi Gharazah through a different chain of narrators to the same effect. This version has: Lying and swearing have a place on i. Abdullah al-Zuhri said: Unprofitable speech and lying.

Narrated Abdullah ibn Abbas: A man seized his debtor who owed ten dinars to him. He said to him: I swear by Allah, I shall not leave you until you pay off (my debt) to me or bring a surety. The Prophet صلی ‌اللہ ‌علیہ ‌وسلم stood as a surety for him. He then brought as much (money) as he promised. The Prophet صلی ‌اللہ ‌علیہ ‌وسلم asked: From where did you acquire this gold? He replied: From a mine. He said: We have no need of it; there is no good in it. Then the Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم paid (the debt) on his behalf.

Narrated Al-Numan bin Bashir: I heard the Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم say: What is lawful is clear and what is unlawful is clear, but between them are certain doubtful things. I give you an example for this. Allah has a preserve, and Allah's preserve is the things He has declared unlawful. He who pastures (his animals) round the preserve will soon fall into it. He who falls into doubtful things will soon be courageous.

Narrated Al-Numan bin Bashir: I heard Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم say: But between them are certain doubtful things which many people do not recognize. He who guards against doubtful things keeps his religion and his honor blameless, but he who falls into doubtful things falls into what is unlawful.

Narrated Abu Hurairah: The Prophet صلی ‌اللہ ‌علیہ ‌وسلم said: A time is certainly coming to mankind when only the receiver of usury will remain, and if he does not receive it, some of its vapour will reach him. Ibn Isa said: Some of its dust will reach him.

Asim ibn Kulayb quoted his father's authority for the following statement by one of the Ansar: We went out with the Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم to a funeral, and I saw the Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم at the grave giving this instruction to the grave-digger: Make it wide on the side of his feet, and make it wide on the side of his head. When he came back, he was received by a man who conveyed an invitation from a woman. So he came (to her), to it food was brought, and he put his hand (i. e. took a morsel in his hand); the people did the same and they ate. Our fathers noticed that the Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم was moving a morsel around his mouth. He then said: I find the flesh of a sheep which has been taken without its owner's permission. The woman sent a message to say: Messenger of Allah, I sent (someone) to an-Naqi' to have a sheep bought for me, but there was none; so I sent (a message) to my neighbour who had bought a sheep, asking him to send it to me for the price (he had paid), but he could not be found. I, therefore, sent (a message) to his wife and she sent it to me. The Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم said: Give this food to the prisoners.

Narrated Abdullah ibn Masud: The Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم cursed the one who accepted usury, the one who paid it, the witness to it, and the one who recorded it.

Narrated Sulaiman bin Amr: On the authority of his father: I heard the Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم say in the Farewell Pilgrimage: Lo, all claims to usury of the pre-Islamic period have been abolished. You shall have your capital sums, deal not unjustly and you shall not be dealt with unjustly. Lo, all claims for blood-vengeance belonging to the pre-Islamic period have been abolished. The first of those murdered among us whose blood-vengeance I remit is al-Harith ibn Abdul Muttalib, who suckled among Banu Layth and killed by Hudhayl. He then said: O Allah, have I conveyed the message? They said: Yes, saying it three times. He then said: O Allah, be witness, saying it three times.

Narrated Abu Hurairah: I heard Messenger of Allah صلی ‌اللہ ‌علیہ ‌وسلم say: Swearing produces a ready sale for a commodity but blots out the blessing. The narrator Ibn al-Sarh said: for earning . He also narrated this tradition from Saeed bin al-Musayyab on the authority of Abu Hurairah from the Prophet صلی ‌اللہ ‌علیہ ‌وسلم.