Genesis 4:5-7, 13-14

but he did not accept Cain and his gift. So Cain became very angry and felt rejected. The LORD asked Cain, “Why are you angry? Why do you look so unhappy? 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.”

Then Cain said to the LORD, “This punishment is more than I can stand! Today you have forced me to stop working the ground, and now I must hide from you. I must wander around on the earth, and anyone who meets me can kill me.”