'Seven fold' in the Bible

And LORD said to him, Therefore whoever kills Cain, vengeance shall be taken on him sevenfold. And LORD appointed a sign for Cain, lest any who finds him should smite him.

If Cain shall be avenged seven fold, truly Lamech seventy-seven fold.

and render to our neighbors sevenfold into their bosom their reproach with which they have reproached thee, O LORD,

Yet if he is found, he shall restore sevenfold. He shall give all the substance of his house.

Moreover the light of the moon shall be as the light of the sun, and the light of the sun shall be sevenfold, as the light of seven days, in the day that LORD binds up the hurt of his people, and heals the stroke of their wound.