Genesis 4:20-24

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

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

And Zillah, she also bare Tubal-cain, an instructer of every artificer in brass and iron: and the sister of Tubal-cain was Naamah.

And 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 to my wounding, and a young man to my hurt.

If Cain shall be avenged sevenfold, truly Lamech seventy and sevenfold.