Leviticus 26:18-21

18“But if after these things you will not obey me, I will proceed to discipline you seven times for your sins.

19I will break down your strong pride. I will make your sky like iron and your land like bronze,

20and your strength will be used up for nothing. Your land will not yield its produce, and the trees of the land will not bear their fruit.

21“If you act with hostility toward me and are unwilling to obey me, I will multiply your plagues seven times for your sins.