Narrated `Abdullah: The Prophet said, "No human being is killed unjustly, but a part of responsibility for the crime is laid on the first son of Adam who invented the tradition of killing (murdering) on the earth. (It is said that he was Qabil).
Hadith ReferenceSahih Bukhari / The Book of Ad-Diyait (Blood - Money) / Hadith: 6867
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة