Major Sin - Oppression!!!

The meaning of oppression is to take away other peoples’ property without right; to beat, abuse, and mistreat them; and to take advantage of the weak.

Allah says in Quran:
Do no suppose that Allah is unmindful of what the unjust do. He only gives them respite until a Day when the eyes will stare in terror as they come hurrying on in fear, their heads upraised, their gaze not returning to them, and their hears blank. And warn mankind of a Day when the punishment will come upon them, and then those who commit oppression will say: “O Lord, give us respite for a little while. We will respond to your call and will follow the messengers.” Thereupon they will be told: “And did you not swear earlier that there would be no ending for you? And you dwelt in the dwellings of those (earlier peoples) who wronged themselves (and were destroyed), and when it was made clear to you how We dealt with them and We set forth examples for you." [14:42-45]

"The way (of blame) is only against those who oppress people." [42:42]

"And those who do wrong will come to know by what a great reversal they will be overturned." [26:227]

Allah’s Messenger (pbuh) said “Allah grants the oppressor respite, but when He finally seizes him, He will not let him escape. He then recited “And such is the grasp of your Lord when He seizes them while they are doing wrong. Truly, His grasp is painful, strong.” [11:102]. [Sahih Bukhari, Volume 6, Book 60, Number 208]
 
The Prophet (pbuh) said “If anyone has done wrong to his brother with regard to his honor or anything else, he should make reparations to him before a Day in which there will be no Dinar or Dirham. If he has any good deeds to his credit, they will be taken from him to the extent of his wrong-doing, and if he did not have any good deeds, the evil deeds of the wronged one will be loaded upon him.” [Bukhari: Kitaab al-Mazaalim, Baab man kaanat lahu mazlamah `inda rajul, Fath al-Baari, 5/101]

The Prophet (pbuh) said “Allah says ‘O My servants, I have prohibited oppression to Myself and have made it prohibited among you, therefore, do not oppress each other’”. [Hadith Qudsi - Sahih Muslim 2577]

Allah’s Messenger (pbuh) asked, “Do you know who the poor is?” The companions said, “The one who is without wealth or property”. The Prophet said “Among my followers, the poor one is that person who will come on the Day of Resurrection with prayers, fasting, zakat and hajj, but also with injustices against others; abusing this one, taking the property of that one, slandering another, hitting another, shedding the blood of another. Then his good deeds will be taken away from him one by one and given to this person and that person (whom he wronged in this life). If his good deeds are exhausted before all his wrong deeds are settled, some of the evil deeds of those whom he wronged will be allocated to him, and he will be thrown into the fire” [Sahih Muslim Book 32, Number 6251]

When the Messenger of Allah (pbuh) sent Mu’adh to Yemen, he told him: “Beware of the supplication of the oppressed, since there is no veil between him and Allah” [Bukhari, Book 43, Hadith 628]

Aa’isha (RA) reported that the Messenger of Allah (pbuh) as saying “If anyone wrongfully takes even one span of another person’s land, on the Day of Resurrection his neck will be encircled by it to the depth of seven earths." [Sahih Al-Bukhari, Volume 4, Book 54, Number 417]

Jaabir (RA) reported: “When Makkah was conquered, the Muslims from Abyssinia returned and came to the Prophet (pbuh). He asked them to tell something of interest about the Abyssinian people. They said “A very old woman was walking by with a jug of water on her head. She passed by a young man, who put his hand between her shoulders and pushed her so hard that she fell down and broke the water jug. Then she stood up and looked at him, and said, ‘You treacherous young man, you will learn! On the Day when Allah will gather the former and latter people together, and your hands and feet will speak about what they did. You will know! That day, the matter between you and me will be settled.” The Prophet (pbuh) remarked, “She spoke the truth. How can Allah bless a nation which does not help its weak ones against its strong?” [Ibn Majah and Baihaqi]

Allah’s Messenger (pbuh) is reported to have said: “There are five person with whom Allah is angry. He may punish them in this world, or may postpone their punishment by fire in the Hereafter.
A- A ruler of a nation who takes from the people but does not share with them nor remove injustices from them,
B- A leader of a people whom they obey but who does not deal equitably between the strong and weak and speaks according to his selfish desires,
C- A man who does not order his wives and children to obey Allah and does not teach them their religious duties,
D- A man who hires a worker, and after the work is completed, does not pay him his full wages,
E- A man who unjustly keeps his wife’s mahr." 
[unable to locate source online, Allahu a'alaam!]

Abdullah ibn Salam said “When Allah created people, they stood upon their feet and lifting their faces toward the sky, they asked, “O Lord, who are you with?” and He replied “With the oppressed one until he is given his rights.” [unable to locate source, Allahu a'alaam!]

Not to socialize with the oppressors

Allah says: “Assemble the oppressors and their cohorts.” [37:22]

Allah says: “and do not lean toward the oppressors, lest the Fire touch you and you have no protecting friends against Allah, then you will not be helped." [11:113]

Ibn Abbas elaborated “Do not lean toward them with love, nor soften your speech with them and show kindness” Al-Suddi and Ibn Sayd said “Do not flatter the tyrants” Ikrama said “It is leaning toward love of them when you obey them and show affection to them”
Abu Aliyah said “Do not be pleased with their deeds”
“Lest the Fire touch you” means that you will be scorched. In the explanation of “You have no protecting friends against Allah” Ibn Abbas says: “There will be no one to prevent Allah’s punishment from reaching you”
[Tafseer Ibn Kathir on 11:113]
 
Sa’eed bin Musayyib said: “Never be pleased with the supporters of tyrants, but oppose them in your hearts; otherwise your good deeds may become as nothing. Makhool Damashqi said: “On the Day of Resurrection, a caller will call, ‘Where are the tyrants and their supporters? If anyone who is present who so much as gave them ink, or filled their bottle with ink, or sharpened their pen, or anything greater than that, he will be gathered with them under the dome of fire and thrown into Hell.” A tailor came to Sufyan Thawri and asked “I sew the sultan’s clothes, am I a supporter of the tyrants?” Sufyan replied, “You are amongst the tyrants! The supporters are those who sell the needles and threads to you.”
[Taken from book 'The Major Sins' by Muhammad bin 'Uthman]

The Prophet (pbuh) is reported to have said, “On the Day of Resurrection, among the first people to enter the Fire will be the floggers who have whips with which they flogged people wrongfully.” Ibn Umar said “On the Day of Resurrection, the aides of the oppressors and their police will be the dogs of Hell.”
[unable to locate source online, Allahu a'alaam!]

The Prophet (pbuh) said, "Do not stand around in a place where an oppressed person is being beaten without coming to his defense. because Allah's curse descends upon such a place."
[unable to locate source online, Allahu a'alaam!]