Irad was born to Enoch, Irad fathered Mehujael, Mehujael fathered Methushael, and Methushael fathered Lamech.

Lamech took two wives for himself, one named Adah and the other named Zillah.

Lamech said to his wives:

Adah and Zillah, hear my voice;
wives of Lamech, pay attention to my words.
For I killed a man for wounding me,
a young man for striking me.

If Cain is to be avenged seven times over,
then for Lamech it will be seventy-seven times!

Methuselah was 187 years old when he fathered Lamech.

Methuselah lived 782 years after the birth of Lamech, and he fathered other sons and daughters.

Lamech was 182 years old when he fathered a son.

Lamech lived 595 years after Noah’s birth, and he fathered other sons and daughters.

So Lamech’s life lasted 777 years; then he died.