question #3 Sahih al-Bukhari 6867, Book 87, Hadith 6 : What lessons can be learned from the story of the first son of Adam in relation to violence and murder?

The Prophet (ﷺ) 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).