Thematic Bible: Of cain slaying abel

but He did not have regard for Cain and his offering. Cain was furious, and he was downcast. Then the Lord said to Cain, "Why are you furious? And why are you downcast? If you do right, won't you be accepted? But if you do not do right, sin is crouching at the door. Its desire is for you, but you must master it." read more.
Cain said to his brother Abel, "Let's go out to the field." And while they were in the field, Cain attacked his brother Abel and killed him.