Where did this come from?

In the course of time Cain brought to the LORD an offering of the fruit of the ground, and Abel also brought of the firstborn of his flock and of their fat portions. And the LORD had regard for Abel and his offering, but for Cain and his offering he had no regard. So Cain was very angry, and his face fell. The LORD said to Cain, “Why are you angry, and why has your face fallen? If you do well, will you not be accepted? And if you do not do well, sin is crouching at the door. Its desire is for you, but you must rule over it.”
Cain spoke to Abel his brother. And when they were in the field, Cain rose up against his brother Abel and killed him.
(Genesis 4:3-8 ESV)
In a real sense, this is the first act of persecution recorded.  Abel did it right; God approved; can was jealous; he tried to get rid of the envy by getting rid of his brother.  To be sure, there is some learned behavior here.  The structure in phrase :Its desire is for you, but you must rule over it..." is the same as the one in chapter 3 - describing Eve's desire to take over headship from her husband.  Envy. That idea that someone else has something you deserve, and if you cannot have it, they will not either.  It's a thread in the Bible.  Where does it come from?  Within.  And that's where it needs to be resolved.