Al-Bara’ b. ‘Azib reported God's Messenger as saying, "A debtor is bound to his debt and will complain to his Lord of loneliness on the day of resurrection.” It is transmitted in Sharh as-sunna. A mursal tradition is transmitted to the effect that Mu'adh was in debt and his creditors went to the Prophet (ﷺ) who sold all his property to pay his debt, with the result that Mu'adh had nothing left. This is the wording in al-Masabih, but the only source in which I have found it is al-Muntaqa.

‘Abd ar-Rahman b. Ka’b b. Malik said that Mu'adh b. Jabal was a generous young man who could save nothing and was always borrowing, so that he expended all his property on his debts. He went to the Prophet (ﷺ) and asked him to speak to his creditors, and if they would have remitted debts to anyone they would have done it to Mu'adh for God’s Messenger’s sake, but God’s Messenger sold them his property with the result that Mu'adh had nothing left. Sa'id transmitted it in his Sunan in mursal form.

Ash-Sharid reported God’s Messenger as saying, ‘‘Delay in payment on the part of one who possesses the means makes it lawful to dishonour and punish him.” Ibn al-Mubarak said that “dishonour” means he may be spoken to roughly and “punish” means he may be imprisoned for it. Abu Dawud and Nasa’i transmitted it.

Abu Sa'id al-Khudrl said that a corpse was brought to the Prophet (ﷺ) on a bier for him to pray over it and he asked the people whether their friend owed anything. On being told that he did, he asked whether he had left anything to discharge it, and when they replied that he had not, he told them to pray over him. But ‘Ali b. Abu Talib said, “I shall be responsible for his debt, Messenger of God,” so he went forward and prayed over him. A version has something to the same effect, adding that he said, “May God redeem your pledges from hell as you have redeemed the pledges of your brother Muslim! No Muslim will discharge his brother’s debt without God redeeming his pledges on the day of resurrection.” It is transmitted in Sharh as- sunna.

Thauban reported God’s Messenger as saying, “If anyone dies free from pride, unfaithfulness regarding spoil, and debt, he will enter paradise.” Tirmidhi, Ibn Majah and Darimi transmitted it.

Abu Musa reported the Prophet (ﷺ) as saying, “The greatest sin in God's sight, after the serious sins which God has prohibited, which a man can bring into His presence is that he should die in debt without leaving enough to discharge it.” Ahmad and Abu Dawud transmitted it.

‘Amr b. ‘Auf al-Muzani reported the Prophet (ﷺ) as saying, “Reconciliation is allowable between Muslims except such as makes unlawful something which is lawful, or makes lawful something which is unlawful ; and Muslims must keep to the conditions they have made, except for a condition which makes unlawful something which is lawful, or makes lawful something which is unlawful.” Tirmidhi, Ibn Majah and Abu Dawud transmitted it, but Abu Dawud's transmission ended at “the conditions they have made.”

Suwaid b. Qais said: Makhrafa al-‘Abdi and I imported some garments from Hajar* and brought them to Mecca. God’s Messenger came to us walking and after he had bargained with us for some trousers we sold them to him. God’s Messenger then said to a man there who was weighing out for pay, “Weigh out and give overweight.” *A name applied to the whole district of al-Bahrain. Ahmad, Abu Dawud, Tirmidhi, Ibn Majah and Darimi transmitted it, Tirmidhi saying this is a hasan sahih tradition.

Jabir said the Prophet (ﷺ) owed him a debt and gave him something extra when he paid it. Abu Dawud transmitted it.

‘Abdallah b. Abu Rabi'a said the Prophet (ﷺ) borrowed forty thousand* from him, and when revenue came in he paid it to him saying, “God most high bless your family and your property! The only reward for a loan is commendation and repayment.” *The text mentions the number. It probably means dirhams. Nasa’i transmitted it.

'Imran b. Husain reported God’s Messenger as saying, “When anyone has something due to him from another he will be credited with sadaqa for every day he allows the other to postpone payment.” Ahmad transmitted it.

Sa'd b. al-Atwal said: My brother died leaving three hundred dinars and some young children, and I wanted to use them for their maintenance, but God’s Messenger said to me, “Your brother is im-prisoned by his debt, so pay it on his behalf.” I went and did so, and returned to tell God’s Messenger that I had done it and that there remained only a woman who claimed two dinars but had no proof she could show. He replied, “Give them to her, for she is speaking the truth.” Ahmad transmitted it.

Muhammad b. ‘Abdallah b. Jahsh said: When we were sitting in the courtyard of the mosque where the biers were laid down and God’s Messenger was sitting in the midst of us, he raised his eyes to the sky and looked, then lowering his eyes and putting his hand on his forehead he said, “Glory be to God, Glory be to God! What severity has come down!” We said nothing all day and night and experienced nothing but good till the morning. Then I asked God’s Messenger what the severity was which had come down, and he replied, “It has to do with debts. By Him in whose hand Muhammad’s soul is, if a man were to be killed in God’s path then come to life, be killed again in God’s path then come to life, and be killed once more in God’s path then come to life owing a debt, he would not enter paradise till his debt was paid.” Ahmad transmitted it, and there is something to the same effect in Sharh as-sunna.

Zuhra b. Ma'bad said his grandfather 'Abdallah b. Hisham would take him out to the market and buy grain, and Ibn ‘Umar and Ibn az- Zubair would meet him and say to him, “Take us into partnership, for the Prophet (ﷺ) has invoked a blessing on you then he would take them into partnership. He would often make a profit of a camel-load* and send it to the house. ‘Abdallah b. Hisham had been taken by his mother to the Prophet (ﷺ) who passed his hand over his head and invoked a blessing on him. Bukhari transmitted it. * Another explanation is that this means he made enough profit to buy a camel with its load' Cf. Mirqat, iii, 344.

Abu Huraira told that the Ansar asked the Prophet (ﷺ) to divide the palm-trees between them and their brethren, but he replied, “No; save us the trouble of maintenance and we shall share the fruit with you.” They said, “We hear and we obey." Bukhari transmitted it.

‘Urwa b. Abul Ja‘d al-Bariqi said that God’s Messenger gave him a dinar to buy a sheep for him. He bought two sheep for him, sold one of them for a dinar and brought him a sheep and dinar. So God’s Messenger invoked a blessing on him in his business dealings, and he was such that if he had bought dust he would have made a profit from it. Bukhari transmitted it.

Abu Huraira traced to the Prophet (ﷺ) the statement that God who is great and glorious says, “I make a third with two partners as long as one of them does not cheat the other, but when he cheats him I depart from them." Abu Dawud transmitted it and Razin added, “and the devil comes."

He reported the Prophet (ﷺ) as saying, “Place trust in him who trusts you, but do not cheat him who cheats you.” Tirmidhi, Abu Dawud and Darimi transmitted it.

Jabir said he intended to go to Khaibar, so he went to the Prophet, gave him a salutation and told him of his purpose. He replied, “When you come to my agent take fifteen camel-loads from him, and if he desires a sign from you put your hand on his collar-bone*”. *This was evidently a pre-arranged sign to show that the Messenger was genuine. Abu Dawud transmitted it.

Suhaib reported God's Messenger as saying, “There are three things which contain blessing: A business transaction with a time specified, muqarada* and mixing wheat and barley for one’s household but not for sale.” Ibn Majah transmitted it. * Giving someone some property to trade with, the profit being shared between the two, but any loss falling on the property.