24 If Cain shall be avenged sevenfold, truly Lamech seventy and sevenfold.
Genesis 4:24 Cross References - JPS_ASV_Byz
Genesis 4:15
15 And the LORD said unto him: 'Therefore whosoever slayeth Cain, vengeance shall be taken on him sevenfold.' And the LORD set a sign for Cain, lest any finding him should smite him.
Matthew 18:22
22 Jesus saith unto him, I say not unto thee, Until seven times, but, Until seventy times seven.