Things that are forbidden in Islam

 Islam is a complete code of life. It has its laws, beliefs and principles. There are things which are forbidden in Islam to do. Those things are haram. So, any believer who does haram things or benefits from  wealth obtained through haram is a sinner.

The following are the some forbidden things in Islam :

SHIRK

It is considered a sin for a Muslim to worship anyone other than Allah, which is known as shirk.

The following is a Quranic verse on shirk:

Say: I am forbidden to worship those on whom ye call instead of God. Say: I will not follow your desires, for then should I go astray and I should not be of the rightly guided.

— [Quran 6:56]

The following is a Hadith relating to the practice of shirk:

It is reported on the authority of Ibn Masʻūd that Muhammad said: "Whoever died while supplicating another deity besides Allah, will enter the Fire."

— Narrated by Bukhari

CLOTHING and ADORNMENTS 

In Islam, both gold adornments and silk cloths are prohibited for men to wear, but are permissible for women as long as they are not used to attract men (other than their husbands). 

It is considered haram for women to wear clothing that fails to cover the body properly and clothes that are transparent. Additionally, Islam prohibits excess beautifying that involves the altering of one's physical appearance. Physical alterations that are considered haram are tattoos and shortening of teeth.

Islam also prohibits the use of gold and silver utensils and pure silk spreads in the household in order to avoid luxurious lifestyles in the home.

Statues are also prohibited in homes, and Muslims are prohibited from participating in making statues because of the idea of negating the Oneness of Allah.

INHERITANCE

It is considered haram for a father to deprive his children of an inheritance. It is also haram for a father to deprive the females or the children of a wife who is not favorable to him an inheritance. Additionally, it is haram for one relative to deprive another relative of his inheritance through tricks.

BUSINESS ETHICS

Riba, any excessive addition over and above the principal, such as usury and interest, is prohibited in Islam in all forms. Interest goes against the Islamic pillar of Zakat which allows wealth to flow from the rich to the poor. Riba is prohibited because it keeps wealth in the hands of the wealthy and keeps it away from the poor. It is also believed that riba makes a man selfish and greedy. 

All business and trade practices that do not result in free and fair exchange of goods and services are considered haram, such as bribery, stealing, and gambling. Therefore, all forms of deceit and dishonesty in business are prohibited in Islam.

There are a number of Quranic verses that relate to the prohibition of unethical business practices:

O you who believe! Devour not usury, doubling and quadrupling (the sum lent). Observe your duty to Allah, that you may be successful.

— [Quran 3:130]

Allah hath blighted usury and made almsgiving fruitful. Allah loveth not the impious and guilty

— [Quran 2:276]

  ZINA

Islam is very strict in prohibiting zina, whether it be adultery or  between two unmarried individuals. Zina is considered to lead to confusion of lineage, leniency in morals, the disconnection among families, and unstable relationships. It is also considered haram to look at members of the opposite sex with desire.

There are Quranic verses on the prohibition of fornication:

And come not near unto adultery. it is an abomination and an evil way.

— [Quran 17:32]

Those who invoke not, with God, any other god, nor slay such life as God has made sacred except for just cause, nor commit fornication – and any that does this (not only) meets punishment.

— [Quran 25:68]

Food and intoxicants 

In Islam,Muslims are prohibited from consuming flowing blood. Meats that are considered haram, such as pork, dog, cat, monkey, or any other haram animals.

There are a number of Quranic verses regarding the prohibition of meat in Islam:

He hath forbidden you only carrion, and blood, and swineflesh, and that which has been immolated to (the name of) any other than God. But he who is driven by necessity, neither craving nor transgressing, it is no sin for him. Lo! God is Forgiving, Merciful.

— [Quran 2:173]

How should ye not eat of that over which the name of God hath been mentioned, when He hath explained unto you that which is forbidden unto you unless ye are compelled thereto. But so many are led astray by their own lusts through ignorance. So the Lord, He is Best Aware of the transgressors.

— [Quran 6:119]

Alcoholic intoxicants are prohibited in Islam. Khamr is the Arabic word for alcoholic drinks that cause intoxication.

It is not permissible for a Muslim to import or export alcoholic beverages, or to work in or own a place that sells these  intoxicants. Giving as a gift is also considered haram.

money earned through cheating, stealing, corruption, murder and Interest or any means that involves harm to another human being.