Deuteronomy 28:58-59

If thou wilt not observe to do all the words of this law that are written in this book, that thou mayest fear this glorious and fearful name, JEHOVAH THY GOD; then Jehovah will make thy plagues wonderful, and the plagues of thy seed, even great plagues, and of long continuance, and sore sicknesses, and of long continuance.