Genesis 4:6-8

New Century Version

⁶ The Lord asked Cain, “Why are you angry? Why do you look so unhappy? ⁷ If you do things well, I will accept you, but if you do not do them well, sin is ready to attack you. Sin wants you, but you must rule over it.”

⁸ Cain said to his brother Abel, “Let’s go out into the field.” While they were out in the field, Cain attacked his brother Abel and killed him.