Genesis 4:23-25

Young's Literal Translation

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.'

²⁵ And Adam again knoweth his wife, and she beareth a son, and calleth his name Seth, `for God hath appointed for me another seed instead of Abel:' for Cain had slain him.