3 So in the course of time, Cain brought some of the fruit of the soil as an offering to the LORD, 4 while Abel brought the best portions of the firstborn of his flock.
And the LORD looked with favor on Abel and his offering, 5 but He had no regard for Cain and his offering. So Cain became very angry, and his countenance fell.
6 "Why are you angry," said the LORD to Cain, "and why has your countenance fallen? 7 If you do what is right, will you not be accepted? But if you refuse to do what is right, sin is crouching at your door; it desires you,4:7 Or it desires to control you but you must master it."