Deuteronomy 28:21-23

The LORD will send terrible diseases to attack you, and you will never be well again. You will suffer with burning fever and swelling and pain until you die somewhere in the land that you captured. The LORD will make the sky overhead seem like a bronze roof that keeps out the rain, and the ground under your feet will become as hard as iron. Your crops will be scorched by the hot east wind or ruined by mildew.