1. Observe Justice

If you observe justice about yourself, you will be trusted in judging others.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.2, p.146.

2. The time of Injustice and Treachery

At a time when you see nothing but injustice and treachery, trusting anyone (unheedingly) brings wretchedness. 
Ibn Shu’bah, Tuhaf al-Uqul, p.357. 

3. Constant Calamities 

Following a calamity after another is the herald of liberation from them.
Ibn Shu’bah, Tuhaf al-Uqul, p.357.

4. Investing Your Trust

Do not invest your trust fully on your friend, since if you fail and lose everything because of dedicating all your love and trust to one person, you could hardly survive its disastrous outcomes.  
Ibn Shu’bah, Tuhaf al-Uqul, p.357.

5. Islam, Faith, Assurance 

Islam is the basis on which faith is founded, and then on faith, assurance is built. People hardly reach the last level, that is assurance. 
Ibn Shu’bah, Tuhaf al-Uqul, p.358.

6. This World

Losing your heart to this world brings you pain and grief while being indifferent and pious to it brings peace to your heart and soul. 
Ibn Shu’bah, Tuhaf al-Uqul, p.358.

7. Three Characteristics of a Believer 

The believer finds righteousness in three characteristics: a deep understanding of the religion, avoiding excessiveness in life, and forbearing the hardships. 
 Ibn Shu’bah, Tuhaf al-Uqul, p.358.

8. Allah's Blessings 

Allah bestows His blessings upon a group of people, and it is turned into burdens on them due to their ingratitude; yet, He inflicts others with calamities, and they turn into blessings due to their forbearance. 
Ibn Shu’bah, Tuhaf al-Uqul, p.359.

9. How to Treat Your Family according to Imam Sadiq (AS)

Whoever does good to his family, Allah prolongs his life. 
 Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.8, p.219. 

10. Making Friends

Meet and make friends with someone who elevates and honors you, not the one whose only purpose is to benefit from you and is pretentious. 
Al-Hurr al-Amili, Wasa'il al-Shia, Vol.11, p.412. 

11. Greetings 

Saying hello is a recommended act (Mustahab) while responding to it is obligatory (Wajib). 
Ibn Shu’bah, Tuhaf al-Uqul, p.360.

12. Be Resistant 

Whoever manifests resistance at times of anger, greed, fear, and lust, Allah will protect his/her body against the fire of hell. 
Ibn Shu’bah, Tuhaf al-Uqul, p.361.

13. Well-being 

Well-being is a less valued blessing; it is forgotten when one is blessed with it, yet it will be reminded of as soon as it is gone. 
Ibn Shu’bah, Tuhaf al-Uqul, p.361.

14. Comfort and Hardship

In comfort, Allah blesses you with His beneficence and excellence, and in hardship, the chance of purging [from your sins]. 
 Ibn Shu’bah, Tuhaf al-Uqul, p.361.

15. Water 

Do not pollute the water that people need. 
Abu Ja'far Muhammad Ibn Hasan Tusi, Tahdhib al-Ahkam, vol.1, p.185.

16. Moderation

Allah loves moderation and hates wastefulness.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.4, p.52.

17. Wastefulness 

The least act of wastefulness is throwing away the remaining of [food or drink].
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.6, p.460.

18. The Weather 

If the weather were always bright and sunny, the earth would turn dry, and the plants would burn off the heat; the water in lakes and rivers would go down, and people would suffer; the weather would be hot and dry, and an unknown kind of sickness would emerge. 
 Mohammad-Baqer Majlesi, Bihar al-Anwar, vol.3, p.125.

19. Muslim Friends 

Between two Muslim friends, the one that loves the other is the better one.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.3, p.193.

20.The Elderly and Children 

Respect the elderly and be kind to the children.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.2, p.165.

21. A Joyful Life 

Life is joyful with three things: clean air, plentiful and pure water, and a soft land [ready for planting]. 
Ibn Shu’bah, Tuhaf al-Uqul, p.320.

22.Washing Hands

Wash your hands before and after eating. 
Ahmad b. Muhammad b. Khalid al-Barqi, Al-Mahasin, vol.1, p.425.

23. Be Careful About What You Wear

Do not wear clothes that attract much attention, neither clothes, which debases you. 
Muhammadi Reyshahri, Mizan al-Hikma, hadith no. 18080. 

24. Brush Your Teeth

Brushing teeth is among the manners of prophets.
Muhammadi Reyshahri, Mizan al-Hikma, hadith no. 9053.

25. On Expressing Your Opinions 

Do not be the first person who expresses his/her opinion when asking for a consult and avoid suggesting naïve views. 
Muhammadi Reyshahri, Mizan al-Hikma, hadith no. 9868.

26. Paying the Wages of a Worker 

Pay the workers' wages before their sweats are dried [ i.e., right after they have finished their work]. 
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.5, p.289.

27. Manners toward Your Teacher 

Be humble in the presence of the one from whom you learned a knowledge.
 Abu Ja'far Muhammad Ibn Hasan Tusi, Tahdhib al-Ahkam, vol.2, p.36.

28. Justice in Imam Sadiq (AS)'s Words 

Justice is more pleasant than the water, which is offered to a thirsty person.
 Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.5, p.289.

29. A piece of Advice for Industrialists

Every industrialist has to master three characteristics for his/her work to flourish; he/she has to be expert in his/her job, has to be reliable and meet their superior managers' demands. 
Mohammad-Baqer Majlesi, Bihar al-Anwar, vol.78, p.236.

30. People's Needs 

People need three things; security, justice, and welfare. 
Ibn Shu’bah, Tuhaf al-Uqul, p.320.

31. A Father's Best Legacy 

A father's best legacy for his children is manners, not wealth.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.8, p.150.

32. Planning 

Planning shapes half of your life. 
Al-Shaykh al-Saduq, Al-Khisal, p.221.

33. Teenagers 

Take care of teenagers since they are more open to absorbing goodness and virtues.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.8, p.93.

34. Books 

There will be chaotic days when people would not find peace unless within their books.
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.1, p.52.

35. Agriculture 

Agriculture is a precious wealth. 
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.5, p.261.

36. Strengthening Ties 

Strengthen your ties with each other, be kind and generous to each other. 
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.2, p.175.

37. Help Each other 

Any believer who solves another believer's problem, Allah will lift seventy of his/her difficulties in this world and the hereafter. 
Mirza Husayn Nuri, Mustadrak al-wasa'il, vol.12, p.413.

38. Fruit Trees 

Do not cut fruit trees, or you will be inflicted with Allah's torment. 
Muhammad ibn Ya'qub al-Kulayni, al-Kafi, vol.5, p.294.

39. The Best Friend 

My favorite friend is the one who bestows me my faults.
Ibn Shu’bah, Tuhaf al-Uqul, p.366. 

40. Earn Halal Income 

Whoever wishes his/her prayers to be granted, should strive to earn Halal income. 
Mohammad-Baqer Majlesi, Bihar al-Anwar, vol.93, p.373.

According to what has been said in the first part of this article, the income one earns is either Halal (gained through lawful ways), which can be freely spent, or Haram (gained through foul means), or sometimes of doubtful origins (mixed up of both Haram and Halal), which must be seriously avoided. Now you might wonder what some of the precise examples of unlawful earning are in today’s world.

What Are the Instances of Unlawful Earning in Islam (Haram Income)?

Riba (Usury)

Translated as usury, Riba refers to unfair, exploitative interests made in business. The unjust interest gained from the repayment of a loan or the simultaneous exchange of unequal commodities are the two common examples of usury. “There is the principle of the relationship between one's efforts and the amassing of wealth and the importance of participating in the risk of losing one's wealth as well as increasing it in any economic transaction. That is why Riba or interest is forbidden in Islamic Law” [1] [i].

Bribery

Prophet Muhammad (PBUH&HP) has said: “The worst unlawful earning is the income a governor gains through bribery” [2]. When some people bribe to gain what they want easily, the others who avoid giving bribes for any reason will face many difficulties to obtain what they are entitled to. Also, the bribe receivers will not fulfill what they are required to do by law unless they are bribed.

So, if bribery spreads among people, especially government officials, in a society, it will definitely lead to an increase of corruption within the community [ii].

Profiteering and Defrauding

One of the great sins in Islam is cheating in selling things, which could be of two kinds; selling something at a higher price than its real value, especially when there is a shortage of that product in the market, and also selling short measures to consumers [iii]. The loss of public trust and financial corruption are among the most devastating results of this sin.

There are also other examples for selling short measures, one of the most common of which happens in offices when employees are not conscientious enough to fulfill their job commitments and responsibilities. So, the income they earn is Haram.

Drug Dealing and the Trade of Alcoholic Drinks

Any income one gains through the role she/he has in producing, distributing, or consuming alcoholic beverages and also drug is considered Haram:

“They ask you about wine and gambling. Say, "In them is a great sin and [yet, some] benefit for people. But their sin is greater than their benefit…"” (2:219)

Muslims believe there is no harming nor reciprocating harm in Islam. So, they seriously avoid anything that inflicts harm upon them or their fellow brothers.

Gambling

Based on the verse above, the money one earns through gambling is Haram, too[iv].

That is because Islam highly recommends earning the livelihood through productive jobs and encourages hard work and striving to earn money rather than becoming wealthy or losing all one’s money overnight.

Ghina

The income one may earn by singing or playing a song which is typical of or suitable for frivolous gatherings, and carouses are also unlawful (Haram) [v].

Indecency

“Indeed those who want indecency to spread among the faithful—there is a painful punishment for them in the world and the Hereafter, and Allah knows, and you do not know” (24:19)

There are numerous instances of indecency in the world we are living today, from the provocative pictures of countless celebrities anyone can find in media, on the internet, etc. to the films that encourage immorality, and to sexual exploitation of women and so forth and so on. In fact, Islam has been sent to spread and complement the best of morality [4].

Therefore, the income earned through any attempt to spread any immorality or indecency in the society is certainly Haram.

Magic and Fortune Telling

Magic and fortune telling are believed to be destructive in the Islamic teachings, since according to the Quran: “Your omen is with Allah” (27:47), so, we should not put our trust in anyone except Him. Islam considers magic an act of devil and a great sin which has to be avoided [vi].

What has been mentioned above are among the most common examples of unlawful income. There are other instances as well which you can ask a proficient Islamic jurist or scholar about. On top of that, human’s common sense and reason can indicate what is exactly unlawful (Haram) and should be avoided.

This article is to give you some hints so that you become more cautious about your income in order to lead a decent and virtuous life.

Notes:
[i] “Those who exact usury will not stand but like one deranged by the Devil’s touch. That is because they say, ‘Trade is just like usury.’ While Allah has allowed trade and forbidden usury” (2:275).

[ii] “Do not eat up your wealth among yourselves wrongfully, nor proffer it to the judges in order to eat up a part of the people’s wealth sinfully, while you know [that it is immoral to do so]” (2:188).

[iii] “‘O my people! Observe fully the measure and the balance, with justice, and do not cheat the people of their goods, and do not act wickedly on the earth, causing corruption’” (11:85).

[iv] “O you who have faith! Indeed wine, gambling, idols, and the divining arrows are abominations of Satan’s doing, so avoid them, so that you may be felicitous” (5:90).

[v] “Among the people is he who buys diversionary talk that he may lead [people] astray from Allah’s way without any knowledge, and he takes it in derision. For such there is a humiliating punishment” (31:6).

[vi] “…and Solomon was not faithless but it was the devils who were faithless—teaching the people magic and what was sent down to the two angels at Babylon, ... They would learn that which would harm them and bring them no benefit; though they certainly knew that anyone who buys it has no share in the Hereafter. Surely, evil is that for which they sold their souls, had they known!” (2:102).

References:

1. S.Hussain Nasr, A Young Muslim’s Guide to Islam, p.58
2. al-Jame al-Saqir, vol. 2, p. 45
3. Allama al-Hilli, Nahj al-haqq wa kashf al-sidq, p. 495
4. Kanz-ol-a’maal, 13th vol. p.151, Hadith #36472