Genesis 4:24

If seven lives are to be taken as punishment for Cain's death, seventy-seven will be taken for Lamech's.

Genesis 4:15

And the Lord said, Truly, if Cain is put to death, seven lives will be taken for his. And the Lord put a mark on Cain so that no one might put him to death.

Matthew 18:22

Jesus says to him, I say not to you, Till seven times; but, Till seventy times seven.

Treasury of Scripture Knowledge

Summary

If Cain shall be avenged sevenfold, truly Lamech seventy and sevenfold.

Seventy

Bible References

If

Genesis 4:15
And the Lord said, Truly, if Cain is put to death, seven lives will be taken for his. And the Lord put a mark on Cain so that no one might put him to death.

Seventy

Matthew 18:22
Jesus says to him, I say not to you, Till seven times; but, Till seventy times seven.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain