1. Adultery, Cowardice, Unjust Rulers, Arrogance and Wine
The Major Sins
Adultery, Cowardice, Unjust Rulers, Arrogance and Wine

2. Fatal Sin Eleven: Running away at times of war
Allaah says :
If any do turn his back to them on such a day unless it be in a strategem of war, or to retreat to a troop (of his own) - He draws on himself the wrath of Allaah and his abode in Hell an evil refugee (indeed)
The Prophet said : Avoid the seven fatal sins......running away at times of war is one of them.

3. Fatal Sin Twelve: Adultery : Some of its kinds are worse than others
Allaah says :
Nor come close to Adultery : for it is a shameful (deed) and an evil, opening the road for other evils.
He also says :
Those who invoke not with Allaah any other god, nor slay such life as Allaah has made sacred, except for just cause, nor commit fornication, and any that does this meets punishment.

4. Also:
The woman and the man guilty of adultery or fornication, flog each of them with stripes, let not compassion move you in neither case, in a matter prescribed by Allaah, if you believe in Allaah and the Last Day : and let a party of the believers witness their punishment.
Let no man guilty of adultery or fornication marry any but a woman similarly guilty, or a unbeliever : nor let any but such a man or an unbeliever mary such a woman : To the Believers such a thing is forbidden.

5. The prophet was asked What is the most fatal of all sins
The prophet was asked What is the most fatal of all sins? The Prophet answered
To worship others with Allaah and He created you. Then what? the man asked. he said : To kill your children for the fear of feeding them, The Prophet responded. The man asked again : Then what? The Prophet said : To commit adultery with your neighbours wife.
Prophet also said : When a man commits adultery, faith comes out of his heart and hovers above him until he leaves the sin, then faith comes back to him again.
Another hadeeth is : Three of whom Allaah does not speak with at the Day of Judgement, nor praise them, and they will have a painful torture, an adultrous old man, a lying king, and a proud sustainer

6. The worst kind of adultery is:
Commited with (ones) mother, sister, or stepmother or the like.
The Prophet said : He who falls on a forbidden woman on him is to be killed.
Al-Bara’a said that the Prophet sent his uncle once to man who fell on his step mother - to kill him [the latter] and seperate his money.

7. Fatal Sin Thirteen: The King who is a cheater, Unjust, and a Tyrant.
Allaah says :
The blame is only against those who oppress men with wrong doing and insolently transgress beyond bounds through the land defying right and justice : for such there will be a penalty grevious.
Also He says :
Nor did they (usually) forbid one another the iniquites which they commit : evil indeed were the deeds which they did.

8. The Prophet said : You are all guardians and each is responsible of his subjects.....The Prophet also said : He who cheats us is not one of us. He said also : Unjustice is darkness at the Day of Judgement
Another hadeeth : He whom Allah gives him subjects to guardian, then care not to advice them well, Allaah will forbid Paradise on him. In another narration he will never smell Paradise. The Prophet said also : He who cheats his subjects is in the Hell-Fire. The Prophet also said : No prince of ten men at the day of Judgement, but comes to Allaah with his hands tied to his neck, either they are set free by his justice, or remain as they are if he was unjust.
The Prophet also said : there are two kinds of people that will never receive my intercession : the first is the unfair, tyrannical king, and an excessor in religion. they will be witnessed and damned.

9. Fatal Sin Fourteen: Drinking Wine
Allaah says :
They ask you concerning wine and gambling. Say : In them is a great sin, and some profit, for men ; but the sin is greater then the profit.
O you who Believe! Intoxicants and gambling stones and a arrow save an abomination of satan’s handiwork eschew such abomination that you may prosper.

10. Ibn Abbaas said : When the verse of forbidding wine was revealed to Muhammad,his comrades walked aroundsaying : wine was forbidden and has been equated with Shirk
Abdullaah Ibn Umar said : Drinking wine is the greatest of sins. And it is the mother of evil deeds, and its drinker was damned in more than one tradition. The Prophet said : He who drinks wine whip him, if he does it once again whip him, the fourth kill him.
The Prophet said: He who leaves his prayers once out of drinking wine : as the one who has all the world then suddenly snaped from him, and he who leaves the prayers four times out of drinking, Allaah will irrigate him from the day of in sanity. The comrades then asked : What is this insanity day? He answered them : The sweat of Hell dewllers. In another narration : squeeze of Hell dewellers. another Hadeeth is : He who drinks liqour on earth will be deprived of it on the hereafter.
He also said : the drunkard meets Allaah as a mushrik when he dies drunk.

11. Fatal Sin Fifteen: Pride, Proudness & Malice
The Almighty said :
Moses said : I have indeed called my Lord and your Lord (for protection) from every arrogant one who believes not in the Day of Judgement .
He also says :
Undoubtly Allaah does know what they conceal and what they reveal verily He loves not the arrogant.
A third verse is :
Those who dispute about the signs of Allaah without any authority bestowed on them - there is nothing in their breasts but greatness which they shall never attain to seek refugee.

12. The Prophet said : He who has an atom of Pride will never enter Paradise. Also, he said
Once a man was walking proudly in his clothes that Allaah made the ground swallow him, and he is rattaling in it till the Day of Judgement. he said also : Proud and pride people will bevalied at the day of Judgement like atoms for the people to step on. One of the Salaf said : The first that Allaah was disobeyed with is pride.
Allaah says :
And behold, We said to the angels ; Bow down to Adam, they bowed down not Iblis, he refused and was haughty he was of those who reject faith : So he who feels proud not to follow the right path as satan has once done, his faith will serve him not.

13. The Prophet said in a hadeeth Qudsee : Allaah says : greatness is my cover, and pride is my gown. He who fights me in them, I shall throw him into Hell.
The Prophet said : Hell & Paradise quarreled togther and went to Allaah saying : Paradise O Allaah why my dewllers all of poor people and weak people. Hell : why are my dewellers all of proud people.
The Almighty says :
That the Home of the Hereafter shall give to those who intend not high-handedness or mischief on earth.