Genesis 4:22-24

Young's Literal Translation

²² And Zillah she also bare Tubal-Cain, an instructor of every artificer in brass and iron; and a sister of Tubal-Cain [is] Naamah.

²³ And Lamech saith to his wives: -- `Adah and Zillah, hear my voice; Wives of Lamech, give ear [to] my saying: For a man I have slain for my wound, Even a young man for my hurt;

²⁴ For sevenfold is required for Cain, And for Lamech seventy and sevenfold.'