Thematic Bible: Of cain slaying abel

but for Cain and for his offering He had no regard So Cain became very angry and his countenance fell. Then the LORD said to Cain, "Why are you angry? And why has your countenance fallen? "If you do well, will not your countenance be lifted up? And if you do not do well, sin is crouching at the door; and its desire is for you, but you must master it." read more.
Cain told Abel his brother. And it came about when they were in the field, that Cain rose up against Abel his brother and killed him.