The Prophet (saws) said: There is no sin more fitted to have punishment meted out by Allah to its perpetrator in advance in this world along with what He stores up for him in the next world than oppression and severing ties of relationship.

Another chain reports a similar hadith.

The Prophet (saws) said: When sin is done in the earth, he who sees it and disapproves of it will be taken like one who was not present, but he who is not present and approves of it will be like him who sees.

Allah's Apostle said, " Horses are kept for one of three purposes; for some people they are a source of reward, for some others they are a means of shelter and for some others they are a source of sins. The one for whom they are a source of reward, is he who keeps a horse for Allah's Cause (i.e. Jihad) tying it with a long tether on a meadow or in a garden with the result that whatever it eats from the area of the meadow or the garden where it is tied will be counted as good deeds for his benefit, and if it should break its rope and jump over one or two hillocks then all its dung and its foot marks will be written as good deeds for him; and if it passes by a river and drinks water from it even though he had no intention of watering it, even then he will get the reward for its drinking. As for the man for whom horses are a source of sins, he is the one who keeps a horse for the sake of pride and pretense and showing enmity for Muslims: such a horse will be a source of sins for him. When Allah's Apostle was asked about donkeys, he replied, "Nothing has been revealed to me about them except this unique, comprehensive Verse: "Then anyone who does an atom's (or a small ant's) weight of good shall see it; And anyone who does an atom's (or a small ant's) weight of evil, shall see it.' (101.7-8)

Once the Prophet, while passing through one of the graveyards of Medina or Mecca heard the voices of two persons who were being tortured in their graves. The Prophet said, "These two persons are being tortured not for a major sin (to avoid)." The Prophet then added, "Yes! (they are being tortured for a major sin). Indeed, one of them never saved himself from being soiled with his urine while the other used to go about with calumnies (to make enmity between friends). The Prophet then asked for a green leaf of a date-palm tree, broke it into two pieces and put one on each grave. On being asked why he had done so, he replied, "I hope that their torture might be lessened, till these get dried."

Abu Hurairah said: (It will atone for his sins) for three days more. he further said: One is rewarded ten times for doing a good work.

Abu Dawud said: The version narrated by Muhammad b. Salamah is perfect, and Hammad did not make a mention of the statement of Abu Hurairah.

The Prophet said, "Whoever performs Hajj to this Ka`ba and does not approach his wife for sexual relations nor commit sins (while performing Hajj), he will come out as sinless as a newborn child, (just delivered by his mother).

Hind bint `Utba came and said, "O Allah's Apostle! Abu Sufyan is a miser so is it sinful of me to feed our children from his property?" Allah's Apostle said, "No except if you take for your needs what is just and reasonable. "

Allah's Apostle said, "When the Imam says, "Sami`a l-lahu liman hamidah," you should say, "Allahumma Rabbana laka l-hamd." And if the saying of any one of you coincides with that of the angels, all his past sins will be forgiven."

Allah's Apostle said, "Anyone who takes an oath through which his family may be harmed, and insists on keeping it, he surely commits a sin greater (than that of dissolving his oath). He should rather compensate for that oath by making expiation."

The Prophet said, "The biggest of Al-Ka`ba'ir (the great sins) are (1) to join others as partners in worship with Allah, (2) to murder a human being, (3) to be undutiful to one's parents (4) and to make a false statement," or said, "to give a false witness."

Allah's Apostle said, "Whoever performs Hajj to this House (Ka`ba) and does not approach his wife for sexual relations nor commits sins (while performing Hajj), he will come out as sinless as a newlyborn child. (Just delivered by his mother).

The Prophet was asked about the great sins He said, "They are:-- (1 ) To join others in worship with Allah, (2) To be undutiful to one's parents. (3) To kill a person (which Allah has forbidden to kill) (i.e. to commit the crime of murdering). (4) And to give a false witness."

The Messenger of Allah (saws) said: It is not right for a Muslim to keep apart from another Muslim for more than three days. Then when he meets him and gives three salutations, receiving during that time no response, the other bears his sin.

Allah's Apostle said, "None has more sense of ghaira than Allah, and for this He has forbidden shameful sins whether committed openly or secretly, and none loves to be praised more than Allah does, and this is why He Praises Himself."

The Prophet said, "There is none having a greater sense of Ghira than Allah, and for that reason He has forbidden shameful deeds and sins (illegal sexual intercourse etc.) And there is none who likes to be praised more than Allah does." (See Hadith No. 147, Vol. 7)

The Prophet said that your Lord said, "Every (sinful) deed can be expiated; and the fast is for Me, so I will give the reward for it; and the smell which comes out of the mouth of a fasting person, is better in Allah's Sight than the smell of musk." (See Hadith No. 584)

The Prophet said, "No fatigue, nor disease, nor sorrow, nor sadness, nor hurt, nor distress befalls a Muslim, even if it were the prick he receives from a thorn, but that Allah expiates some of his sins for that."

Allah's Apostle said, "When the Imam, during the prayer, says, "Allah hears him who praises Him', say: 'O Allah! Our Lord! All the praises are for You/, for if the saying of anyone of you coincides with the saying of the angels, his past sins will be forgiven."

The Messenger of Allah (saws) gave us an address and said: The best of you is the one who defends his tribe, so long as he commits no sin.

Abu Dawud said: Abu Ayyub b. Suwaid is weak.

Concerning the Waqf of `Umar: It was not sinful of the trustee (of the Waqf) to eat or provide his friends from it, provided the trustee had no intention of collecting fortune (for himself). Ibn `Umar was the manager of the trust of `Umar and he used to give presents from it to those with whom he used to stay at Mecca.

The Prophet (saws) said: If anyone is given a legal decision ignorantly, the sin rests on the one who gave it. Sulayman al-Mahri added in his version: If anyone advises his brother, knowing that guidance lies in another direction, he has deceived him. These are the wordings of Sulayman.

A hadith similar to the above has been narrated through a chain differing from the first at the 4th level of narrators.

`Ukaz, Mijanna and Dhul-Majaz were markets during the Pre-islamic Period. They (i.e. Muslims) considered it a sin to trade there during the Hajj time (i.e. season), so this Verse was revealed:-- "There is no harm for you if you seek of the Bounty of your Lord during the Hajj season." (2.198)