Leviticus 26:15-16

¹⁵and if you reject DOU my decrees and laws, and do not do DOU what I commanded you to do in the agreement that I made with you,

¹⁶these are the things that I will do to you: I will suddenly cause there to be disasters that will ruin you. You will have diseases that cannot be cured, and fevers that will cause you to become blind and will slowly kill you. It will be useless for you to plant seeds, because your enemies will eat the crops that grow.