Blood Money (Ad-Diyat)
Bukhari :: Book 9 :: Volume 83 :: Hadith 9
Narrated 'Abdullah bin 'Amr:
The Prophet said, "Al-Kaba'ir (the biggest sins) are: To join others (as partners) in worship with Allah, to be undutiful to one's parents," or said, "to take a false oath." (The sub-narrator, Shu'ba is not sure) Mu'adh said: Shu'ba said, "Al-kaba'ir (the biggest sins) are: (1) Joining others as partners in worship with Allah, (2) to take a false oath (3) and to be undutiful to one's parents," or said, "to murder (someone unlawfully).