If killing Cain costs seven lives, for Lamech, it will cost seventy-seven!”
Jesus answered, “Not seven times, Peter, but seventy times seven times!
Yahweh responded, “Not so! If anyone kills you, I promise the seven-fold vengeance of Cain will be released upon him!” So, Yahweh put an identifying sign on Cain as a warning so that no one would dare kill him.