Genesis 4:15-16
Genesis 4:15-16 KJV
And the LORD said unto him, Therefore whosoever slayeth Cain, vengeance shall be taken on him sevenfold. And the LORD set a mark upon Cain, lest any finding him should kill him. And Cain went out from the presence of the LORD, and dwelt in the land of Nod, on the east of Eden.