2073. It is not permissible to probe and spy into another person’s house with the intention of gathering information for the sake of enjoining good and forbidding evil.

2074. In the event that enjoining good or forbidding evil entails hardship and difficulty for the one who is enjoining it or prohibiting it, to the extent that is it not considered tolerable in the common sense, it will no longer be obligatory, except in cases where it is of such importance within the sacred sharia that one is not excused from it due to hardship, such as protecting the religion or the lives of the Muslims.

2075. It is emphatically obligatory upon every duty-bound Muslim to enjoin his family towards goodness and prohibit them from committing evil in accordance to the following command of the Almighty Lord:
"يا أَيُّهَا الَّذينَ آمَنُوا قُوا أَنْفُسَكُمْ وَ أَهْليكُمْ ناراً وَقُودُهَا النَّاسُ وَ الْحِجارَة"
O those who believe! Save yourselves and your families from the fire of hell, whose fuel is people and stones. (al-TaÎrÐm: verse 6)
He should enjoin them towards the practices that he enjoins upon himself, and prohibit them from those which he prohibits upon himself.

2076. It is obligatory upon every duty-bound Muslim to detest evil within his heart, even if he is unable to stop its practice.
In the practice of enjoining good and forbidding evil, one should first try to compel another to perform good or abstain from evil by displaying his esoteric detest for it, even if it is by breaking social ties with the person who abstains from what is good or commits what is evil, and through his speech by advising and counseling him, and informing him of the rewards of performing what is good and the divine punishment for committing evil.
However, if these two methods bear no results, and stopping the person is contingent on striking the person, then it should be in a manner that does not entail a diyah (blood money) or qiÒÁs (retribution), such as a case where it causes an injury. In the event that the injury is caused intentionally, the injured person may seek retribution, and if it is caused unintentionally, the injured person may claim the diyah.

2077. When enjoining good or forbidding evil, the duty of the one enjoining the good or forbidding the evil is to bear in mind the objectives of the Sacred Legislator of the sharia, which is to guide the one who is going astray and reform the one who is corrupted. This objective cannot be fulfilled unless he views the one who is afflicted with sins as a damaged part of his own body. He should then proceed to cure those who are afflicted with spiritual maladies in the same manner that he works on curing a part of his own body. The one who enjoins good and forbids evil should not be negligent of the fact that the records of the sinner may contain a good deed through which God may forgive him, and that his own record of deeds may contain a sin for which God may punish him.

2078. It is recommended to enjoin people towards recommended acts.

Conclusion
Every sin is a major violation, because the greatness, majesty and grandeur of the Lord is not limited by any boundaries, and therefore disobeying the Exalted Lord is a major violation, given that sinning against the Exalted Lord is a grave act. It has been narrated, “Do not consider the sin that you have committed, rather consider the one whom you have disobeyed.”
However, when sins are compared to each other, some of them are graver than others and their punishment is more severe. The punishment or the fire of hell has been explicitly or implicity promised for some of these sins. These sins have also been termed as the major sins (kabÐrah) within the corpus of traditions from the Ahl al-Bayt (Peace be upon him). In addition, based on the following verse, abstaining from such sins is a cause for the forgiveness of other sins:
" إِنْ تَجْتَنِبُوا كَبائِرَ ما تُنْهَوْنَ عَنْهُ نُكَفِّرْ عَنْكُمْ سَيِّئاتِكُم‏"
If you refrain from the major sins that you have been prohibited from, we shall absolve you of your (minor) sins. (al-NisÁ’: verse 31)
Some of the jurisprudents (may the Lord raise their station) have enumerated them to seventy, and some of them have added a few more to this list. Below we will mention those which are more common:
1. Disbelieving in the Lord and ascribing partners to Him, the gravity of which cannot be compared to any of the major sins.
2. Losing hope and despairing from mercy of Allah.
3. To feel secure from the plans of the Lord.
4. To falsely swear by the name of the Lord.
5. Rejecting Divine revelation.
6. Declaring war against the friends of Allah.
7. Declaring war against the Lord and His messenger by banditry or making mischief in the land.
8. Giving judgment based on sources which are not Divinely revealed.
9. Ascribing a lie to Allah, His messenger and the messenger’s successors.
10. Obstructing people from remembering Allah in the mosques and working to destroy the mosques.
11. Obstructing the payment of the obligatory ZakÁt.
12. Fleeing from an obligatory jihad.
13. Fleeing from a war fought by the Muslims against the kÁfirs.
14. Leading people astray from the path of Allah.
15. Persisting in committing minor sins.
16. Intentionally abstaining from prayers and other divinely legislated obligations.
17. Showing off.
18. Engaging in vain practices, such as playing the tar (guitar like instrument).
19. Befriending an oppressor.
20. Helping an oppressor
21. Breaking a pledge or an oath.
22. TabdhÐr: damaging a property or spending it for futile purposes.
23. Extravagance.
24. Consuming wine.
25. Practicing magic.
26. Oppressing.
27. Ghina (like Singing).
28. Upsetting one’s parents and treating them unkindly.
29. Breaking off familial relations.
30. Homosexuality.
31. Adultery.
32. Accusing a married woman of adultery.
33. Pandering, be it for heterosexual or homosexual relationships.
34. Stealing.
35. Usury.
36. Consuming illegal profits, such as the profits from the sale of wine, the payment of a prostitute, and the bribe acquired by a judge for a court judgment.
37. Giving short measure.
38. Defrauding Muslims.
39. Confiscating the property of an orphan unlawfully.
40. Giving false testimony.
41. Concealing testimony.
42. Spreading indecency and sin amongst the believers.
43. Sedition.
44. Taletelling that leads to disunity amongst the believers.
45. Verbally abusing a believer, insulting or humiliating him.
46. Slandering a believer.
47. Backbiting. This is defined as the act of relating a concealed and hidden defect of a believer in his absence, regardless of whether one conveys the defect through his speech or his actions. It will also make no difference if he did not have the intention of insulting or damaging his character. However, if a person reveals the defect of a believer with the intention of insulting him, he will have committed two sins.
One who backbites must seek repentance (from the Lord), and obligatory precaution dictates that he should also seek forgiveness from the one who was backbitten, unless doing so would cause harm.

Backbiting is permissible in the following cases:
1. One who commits sins openly and publicly, in which case it is permissible to backbite him with respect to that sin.
2. For an oppressed person to backbite an oppressor who has oppressed him, with respect to that act of oppression.
3. For the purpose of counselling, wherein the purpose of revealing the defect is to advise the one who is seeking counsel, and only to the extent that is required for him to be advised.
4. Backbiting one who innovates new practices within the religion, and one who causes people to go astray.
5. Backbiting for the purpose of revealing the corrupt of the witness, in the sense that if the person testifying is an immoral person, then to backbite him with the intent of revealing his immorality so that a person’s right is not violated owing to his testimony, is permissible.
6. Backbiting a person for the purpose of defending his life, honor or property.
7. Backbiting a sinner with the intention of restraining him from committing the sin, in the event that it is not possible to restrain him using any other means.

The Precepts of Buying and Selling
2079. It behooves every businessman to learn the precepts that pertain to buying and selling. In fact, in the cases where he has certainty or satisfaction—be it in a specific or general manner—owing to his ignorance of the precepts, he will be exposing himself to abandoning an obligation or committing a prohibited act; it is necessary for him, therefore, to learn the precepts that pertain to that case.
It has been narrated from Imam al-¥¡diq (as), “One who wishes to engage in business should be educated in his religion, so that he is aware of what is permissible for him and what is prohibited. One who engages in business while being uneducated in his religion, is afflicted with dubious transactions.”

2080. If a person cannot determine whether a transaction is valid or void owing to his ignorance of its rulings, he may not sanction the transaction, nor make use of the property that he acquired from the transaction.

2081. A person who does not possess any property, whilst certain expenses are obligatory on him, such as caring for his wife and children, must earn his living. It is also recommended to earn for the purpose of being able to perform recommended works, such as providing a better means of livelihood for one’s family and helping the poor.

Recommended Acts
Whilst buying or selling, certain acts are recommended, of which some are listed below:
1. One should not discriminate between the buyers with respect to the price of the goods, unless it is based on faith, poverty or similar criteria which warrant preferential treatment.
2. One should not be adamant about the price, except in a case where he may be cheated were he not to do so.
3. A person should give a little more of what he is selling, and take a little less of what he is buying.
4. If the other party involved in the transaction regrets making the transaction, and requests to cancel it, one should accept his request.

The Transactions which are Makruh
2082. Of the transactions which are makruh, the main ones are listed below:
1. Selling real estate, such as a land, house, garden or water, unless one buys another person’s estate with the funds acquired from the transaction.
2. Butchery
3. Selling of shrouds
4. Entering into a transaction with people of low character
5. Transacting and displaying the goods for that purpose, between the [adh¡n] call for prayers of [fajr] dawn and sunrise.
6. To undertake the profession of buying and selling wheat, barley or similar commodities.
7. To intervene in an ongoing transaction with the intent to buy the goods that another person wishes to buy.

Transactions which are Prohibited and Invalid
2083. Some transactions are invalid but not forbidden, and some are forbidden but not invalid, and some are both: forbidden and invalid. Of these, the main ones are:
1. Some of the essentially najis items, such as intoxicating drinks and pigs, the selling and buying of which is both forbidden and invalid. The same goes for najis carcasses and non-hunting dogs, selling and buying of which is invalid, and based on obligatory precaution forbidden as well.
In other than the aforementioned cases, in the event that it has a permissible benefit, one accepted by intelligent persons, such as animal waste which is used as fertilizers, or blood which is injected into sick patients, buying and selling of it is permissible and valid. The recommended precaution however is that it should be avoided.
2. Buying and selling usurped property, which is invalid without the permission of the owner. However, the act itself is not forbidden; rather, any corporeal use of the usurped property is forbidden.
3. Buying or selling things which are of no actual value in the eyes of the people, and buying or selling it would be considered absurd by them, such as animals which are considered to have no (monetary) value. Such a transaction is invalid, but not forbidden.
4. Transacting a thing which is usually utilized in a forbidden manner, such as media for gambling, which is both invalid and forbidden.
5. A transaction which involves interest is both invalid and forbidden.
6. Selling goods that are adulterated with something else, given that the other good is unknown, and the seller does not inform the buyer either, such as selling ghee which has been mixed with suet, or setting a price on an adulterated item. Such a transaction is invalid, and in some cases—as will be elaborated later—forbidden.
The Holy Prophet (sawas) has made a statement to the following effect, “He is not of the Muslims, one who deceives the Muslims.”
It has also been reported from him, “Whoever deceives his Muslim brother, God withholds his blessings from the person’s sustenance, constrains his livelihood, and abandons him to himself.”

2084. There is no problem in selling a §¡hir item which has become najis, but is washable. However, if the buyer wishes to consume the item, or requires it for a task in which the apparent §ah¡rah of the item is not sufficient, such as water for performing wu¤u’ or ghusl, then the seller must inform him of it being najis. The same will apply based on obligatory precaution to clothes, if the buyer wishes to offer prayers with genuinely §¡hir clothes, even though the apparent §ah¡rah of the body and the clothes will suffice for prayers in the case of one who is ignorant (of it being najis).

2085. If a §¡hir item which is not washable becomes najis, but possesses a legally permissible benefit accepted by intelligent people, then there is no harm in buying or selling it. However, if the buyer needs it for a purpose like consuming it, or if its being najis invalidates the buyer’s act of worship which is conditional on it being §¡hir, then it is obligatory on the seller to inform the buyer of it being najis. An example of this would be a buyer wanting to burn najis oil, but in the process making his food najis, or rendering his body najis whereby invalidating his wu¤u’ or ghusl. Similarly, obligatory precaution dictates that the seller should inform the buyer in cases where even though the naj¡sah of the body or the clothes does not invalidate one’s wu¤u’ or ghusl, but the buyer wishes to pray with a body or with clothes which are genuinely §¡hir.

2086. Buying and selling najis consumable medicines is not valid in the event that it does not possess a legally permissible benefit—other than its consumption—that is accepted by intelligent people. In the event that it does, it is valid. However, the seller must inform the buyer of it being najis.
If the medicine is not meant to be consumable, buying or selling it is permissible. However, the seller must inform the buyer in the manner outlined in the previous article.

2087. There is no problem in buying or selling oil that is imported from non-Muslim countries as long as one does not know it to be najis. The same will apply if it is known to be najis, but also possesses a legally permissible benefit accepted by intelligent people. In the latter case, the seller must inform the buyer according to the details which were elaborated in article 2085.
As for the oil that is derived from an animal after its death, even though one may entertain the possibility that it was slaughtered according to Islamic law, if it is acquired from the hands of a k¡fir—in the event that it is not determined that the k¡fir acquired it from a Muslim or a Muslim market—or imported it from non-Muslim countries, it is forbidden to consume it, and buying or selling it is invalid, and it will be considered najis.

2088. If a fox or similar animal is slaughtered in a manner that has not been prescribed by the shari’a, or if it dies by itself, then buying or selling its skin will not be valid, and based on precaution forbidden as well.

2089. Buying or selling leather products which are imported from non-Muslim countries, or are acquired from the hands of a k¡fir—in the event that it is not determined that the k¡fir acquired it from a Muslim or a Muslim market—is not valid, even though one may entertain the possibility that it was slaughtered according to Islamic law. It is also not permissible to offer prayers in it.