'Seventy' in the Bible

If Cain shall be avenged seven-fold; Lemech seventy and seven fold.

And Cainan lived seventy years, and begot Mahalaleel.

And Terah lived seventy years, and begot Abram, Nahor, and Haran.

And the sons of Joseph who were born to him in Egypt, were two souls. All the souls of the house of Jacob that came to Egypt were seventy.

And forty days were fulfilled for him; for so are fulfilled the days of those who are embalmed. And the Egyptians mourned for him seventy days.