70 Major sins in Islam
- Associating anything with Allah
- Murder
- Practicing magic
- Not Praying
- Not paying Zakat
- Not fasting on a Day of Ramadan without excuse
- Not performing Hajj, while being able to do so
- Disrespect to parents
- Abandoning relatives
- Fornication and Adultery
- Homosexuality (sodomy)
- Interest (Riba)
- Wrongfully consuming the property of an orphan
- Lying about Allah and His Messenger
- Running away from the battlefield
- A leader’s deceiving his people and being unjust to them
- Pride and arrogance
- Bearing false witness
- Drinking Khamr (wine)
- Gambling
- Slandering chaste women
- Stealing from the spoils of war
- Stealing
- Highway Robbery
- Taking false oath
- Oppression
- Illegal gain
- Consuming wealth acquired unlawfully
- Committing suicide
- Frequent lying
- Judging unjustly
- Giving and Accepting bribes
- Woman imitating man and man imitating woman
- Being cuckold
- Marrying a divorced woman in order to make her lawful for the husband
- Not protecting oneself from urine
- Showing-off
- Learning knowledge of the religion for the sake of this world and concealing that knowledge
- Betrayal of trust
- Recounting favours
- Denying Allah’s Decree
- Listening to people’s private conversations / eavesdropping
- Carrying tales
- Cursing
- Breaking contracts
- Believing in fortune-tellers and astrologers
- A woman’s bad conduct towards her husband
- Making statues and pictures
- Lamenting, wailing, tearing the clothing, and doing other things of this sort when an affliction befalls
- Treating others unjustly
- Overbearing conduct toward the wife, the servant, the weak, and animals
- Offending one’s neighbour
- Offending and abusing Muslims
- Offending people and having an arrogant attitude toward them
- Trailing one’s garment in pride
- Men wearing silk and gold
- A slave running away from his master
- Slaughtering an animal which has been dedicated to anyone other than Allah
- To knowingly ascribe one’s paternity to a father other than one’s own
- Arguing and disputing violently
- Withholding excess water
- Giving short weight or measure
- Feeling secure from Allah’s Plan
- Offending Allah’s righteous friends
- Not praying in congregation but praying alone without an excuse
- Persistently missing Friday Prayers without any excuse
- Usurping the rights of the heir through bequests
- Deceiving and plotting evil
- Spying for the enemy of the Muslims
- Cursing or insulting any of the Companions of Allah’s Messenger
Source: https://islambestreligion.wordpress.com/2011/09/08/70-major-sins-in-islam/