Genesis 4:3-7

³In the course of time Cain brought to the LORD an offering of the fruit of the ground, ⁴and Abel brought of the firstlings of his flock and of their fat portions. And the LORD had regard for Abel and his offering, ⁵but for Cain and his offering he had no regard. So Cain was very angry, and his countenance fell. ⁶The LORD said to Cain, "Why are you angry, and why has your countenance fallen? ⁷If you do well, will you not be accepted? And if you do not do well, sin is couching at the door; its desire is for you, but you must master it."