Genesis 4:19, 23-24 (NIV)
19 Lamech married two women, one named Adah and the other Zillah.
23 Lamech said to his wives,
“Adah and Zillah, listen to me;
wives of Lamech, hear my words.
I have killed a man for wounding me,
a young man for injuring me.
24 If Cain is avenged seven times,
then Lamech seventy-seven times.”