"I heard Ana's say: 'The Messenger of Allah said: 'the major sins are; associating others with Allah (shirk), disobeying one's parents, killing a soul (murder) and speaking falsely.
Sunan an-Nasa'i Book 45, Hadith 162
← Previous Hadith Ibn 'Abbas was asked about someone who killed a believer deliberately then he repented, believed and did righteous deeds, and followed true guidance. Ibn 'Abbas said: "There is no way he could repent! I heard your Prophet say; He (the victim) will come hanging onto his killer with his jugular veins flowing with blood and saying: "Ask him why he killed me." Then he said: "by Allah, Allah revealed it and never abrogated anything of it.

Sunan an-Nasa'i Book 45, Hadith 161 Next Hadith → "The major sins are: associating others with Allah, disobeying parents, killing a souls (murder) and swearing a false oath knowingly.

Sunan an-Nasa'i Book 45, Hadith 163