Genesis 4:4-6 Revised Standard Version (RSV)
4 and Abel brought of the firstlings of his flock and of their fat portions. And the Lord had regard for Abel and his offering, 5 but for Cain and his offering he had no regard. So Cain was very angry, and his countenance fell. 6 The Lord said to Cain, “Why are you angry, and why has your countenance fallen?