Genesis 4:23-24

²³Lamech said to his wives,

“Adah and Zillah,
Listen to my voice,
You wives of Lamech,
Give heed to my speech,
For I have killed a man for wounding me;
And a boy for striking me;
²⁴If Cain is avenged sevenfold,
Then Lamech seventy-sevenfold.”