Genesis 4:13

10 And he said to him: What hast thou done? the voice of thy brother's blood crieth to me from the earth.

11 Now therefore cursed shalt thou be upon the earth, which hath opened her mouth and received the blood of thy brother at thy hand.

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 from thy face I shall be hid, 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 so be: 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.