Thematic Bible: The threatened punishment of israel was sevenfold

And if for these things ye will not yet hearken to me, then I will chastise you seven times more for your sins. And I will break the pride of your power. And I will make your sky as iron, and your earth as brass, and your strength shall be spent in vain, for your land shall not yield its increase, nor shall the trees of the land yield their fruit. read more.
And if ye walk contrary to me, and will not hearken to me, I will bring seven times more plagues upon you according to your sins.