'Seventy' in the Bible

If Cain is avenged sevenfold, Then Lamech [will be avenged] seventy and seven [times].

When Kenan had lived seventy years, he fathered Mahalalel.

When Terah had lived seventy years, he fathered Abram, Nahor, and Haran.

And the sons of Joseph who were born to him in Egypt [were] two persons. All the persons of the house of Jacob who came to Egypt [were] seventy.

Forty days {were required for it}, for thus [are] the days {required for} embalming. And the Egyptians wept for him seventy days.