Deuteronomy 28:59 in the King James Version
Then the LORD 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.
Context
58 If you will not observe to do all the words of this law that are written in this book, that you may fear this glorious and fearful name, THE LORD your God,
59 then the LORD will make your plagues and the plagues of your offspring fearful, even great plagues, and of long duration, and severe sicknesses, and of long duration.
60 He will bring on you again all the diseases of Egypt, which you were afraid of; and they will cling to you.