Genesis 4

12 When thou shalt till it, it shall not yield to thee its fruit: a fugitive and a vagabond shalt thou be upon the earth. 13 And Cain said to the Lord: My iniquity is greater than that I may deserve pardon. 14 Behold thou dost cast me out this day from the face of the earth, and I shall be hidden from thy face, and I shall be a vagabond and a fugitive on the earth: every one, therefore, that findeth me, shall kill me. 15 And the Lord said to him: No, it shall not be so: but whosoever shall kill Cain, shall be punished sevenfold. And the Lord set a mark upon Cain, that whosoever found him should not kill him. 16 And Cain went out from the face of the Lord, and dwelt as a fugitive on the earth, at the east side of Eden.