Sayyiduna Abu Sa‘id Khudri (may Allah be pleased with him) narrates: The Noble Prophet (peace and blessings be upon him) said:“(In Islam) there is to be neither harming nor reciprocating harm. Whoever tries to cause harm, Allah will afflict him with harm, and whoever tries to cause hardship, Allah will afflict him with hardship.”

Abu Wahb narrates: Sayyiduna 'Ada bin Khalid said to me: Shall I read to you the document which the Noble Prophet (peace and blessings be upon him) wrote for me? (Its words are:) "This (document is about) 'Ada bin Khalid bought a slave (the narrator is in doubt, perhaps a slave-girl) from Allah's Messenger Muhammad (peace and blessings be upon him), in whom there is no defect, no deception, no fault; this is a transaction of a Muslim with another Muslim." In another narration, these words are: Then he brought out this document before me: "This (document is about) 'Ada bin Khalid bought a slave (the narrator is in doubt, perhaps a slave-girl) from Allah's Messenger Muhammad (peace and blessings be upon him) (here the narrator named 'Abad is in doubt), in whom there is no defect, no deception, no fault; this is a transaction of a Muslim with another Muslim."

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: When Sayyiduna Abbas bin Abdul Muttalib (may Allah be pleased with him) would give his wealth to someone as mudarabah (profit-sharing partnership), he would stipulate the condition that the person should not travel by sea with that wealth, should not camp with it in any (valley (i.e., barren) place, should not purchase any living creature with it, and if he did so, he would be liable (to pay compensation) for it. Then he mentioned this condition before the Noble Prophet (peace and blessings be upon him), and he approved it.

Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates: I attended a funeral prayer in which the Prophet Muhammad (peace and blessings be upon him) was also present. When the deceased was placed, the Prophet (peace be upon him) inquired: "Does he have any debt?" The people replied: "Yes!" So the Prophet (peace be upon him) began to move away and said: "You people perform the funeral prayer of your companion." When Sayyiduna Ali (may Allah be pleased with him) saw the Prophet (peace be upon him) returning, he said: "O Messenger of Allah! This person is free from his debt; whatever payment is due upon him, I am its guarantor." So the Prophet (peace be upon him) returned and performed the funeral prayer for that person. When he finished the prayer, he said: "O Ali! May Allah reward you with goodness. Just as you have taken the responsibility of your Muslim brother's payment, in the same way, may Allah take responsibility for your payments on the Day of Resurrection. Whoever pays off his brother's debt, Allah will be responsible for his payments on the Day of Resurrection." An Ansari man stood up and asked: "O Messenger of Allah! Is this ruling specific to Ali?" The Prophet (peace be upon him) said: "No, rather it is general for all Muslims."

Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates: The Prophet (peace and blessings of Allah be upon him) attended a funeral. When it was placed down, it was said: He has a debt upon him. The Prophet (peace and blessings of Allah be upon him) stepped back, so Sayyiduna Ali said: "O Messenger of Allah! I will guarantee it, in paying the debt." So the Prophet said: "O Ali! May Allah fulfill your needs just as you have fulfilled the need of your fellow Muslim brother." The people asked: "O Messenger of Allah! Is this ruling specific to Sayyiduna Ali or is it general for all the believers?" The Prophet (peace and blessings of Allah be upon him) said: "It is general for all the believers."

Sayyiduna Jabir (may Allah be pleased with him) narrates: A man passed away, so we gave him ghusl (ritual washing), shrouded him, applied fragrance to him, and placed him near the spot of Jibreel (peace be upon him), where the funeral processions were kept. Then we informed the Prophet (peace and blessings be upon him) about it, so that he would lead his funeral prayer. The Prophet (peace and blessings be upon him) walked with us for a few steps, then he said: "Perhaps your companion is in debt?" The people replied: "Yes, he owed two dinars." So the Prophet (peace and blessings be upon him) turned back. One of us, whose name was Abu Qatadah, said to him: "O Messenger of Allah! The payment of those two (dinars) is upon me." So the Prophet (peace and blessings be upon him) said: "The payment of both is upon you and from your wealth, and the right of the (creditor) is upon you, this deceased is free from both." So Sayyiduna Abu Qatadah said: "Yes." Then the Prophet (peace and blessings be upon him) led the funeral prayer for that person. After that, whenever the Prophet (peace and blessings be upon him) met Sayyiduna Abu Qatadah, he would ask him: "What did you do about those two dinars?" Eventually, when Sayyiduna Abu Qatadah informed him: "O Messenger of Allah! I have paid both of them," the Prophet (peace and blessings be upon him) said: "Now this person has found relief."

Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates this statement of the Noble Prophet (peace and blessings be upon him): "Among the deeds done in servitude to Allah Almighty, the most virtuous is to gain understanding in religion. A jurist is more severe (a cause of distress) for Satan than a thousand worshippers. Everything has a pillar, and the pillar of this religion is jurisprudence (fiqh)." Sayyiduna Abu Hurairah (may Allah be pleased with him) says: "For me, to sit for an hour and acquire knowledge of religion is more beloved than spending the whole night performing voluntary prayers."

Sayyiduna Ali (may Allah be pleased with him) narrates: The Noble Prophet (peace and blessings be upon him) said: "The Prophets are leaders, the jurists are chiefs, and their companionship increases (one) in knowledge and reward."