24 If Cain shall be avenged seven fold, also Lamech seventy and seven.
Genesis 4:24 Cross References - JuliaSmith
Genesis 4:15
15 And Jehovah will say to him, Therefore, every one killing Cain, he shall be avenged seven fold. And Jehovah will put a sign upon Cain, lest any finding him, smite him.
Matthew 18:22
22 And Jesus says to him, I say not to thee, till seven times; but till seventy times seven.