Deuteronomy 28:27-29

The LORD will afflict you with the boils of Egypt and with tumors, festering sores and the itch, from which you cannot be cured. The LORD will afflict you with madness, blindness and confusion of mind. At midday you will grope about like a blind person in the dark. You will be unsuccessful in everything you do; day after day you will be oppressed and robbed, with no one to rescue you.