Genesis 4:15-24

15And the LORD said unto him, Therefore whosoever slayeth Cain, vengeance shall be taken on him sevenfold. And the LORD appointed a sign for Cain, lest any finding him should smite him.

16And Cain went out from the presence of the LORD, and dwelt in the land of Nod, on the east of Eden.

17And Cain knew his wife; and she conceived, and bare Enoch: and he builded a city, and called the name of the city, after the name of his son, Enoch.

18And unto Enoch was born Irad: and Irad begat Mehujael: and Mehujael begat Methushael: and Methushael begat Lamech.

19And Lamech took unto him two wives: the name of the one was Adah, and the name of the other Zillah.

20And Adah bare Jabal: he was the father of such as dwell in tents and have cattle.

21And his brother’s name was Jubal: he was the father of all such as handle the harp and pipe.

22And Zillah, she also bare Tubal-cain, the forger of every cutting instrument of brass and iron: and the sister of Tubal-cain was Naamah.

23And Lamech said unto his wives: Adah and Zillah, hear my voice; Ye wives of Lamech, hearken unto my speech: For I have slain a man for wounding me, And a young man for bruising me:

24If Cain shall be avenged sevenfold, Truly Lamech seventy and sevenfold.