וְהִפְלָ֤א יְהוָה֙ אֶת־מַכֹּ֣תְךָ֔ וְאֵ֖ת מַכּ֣וֹת זַרְעֶ֑ךָ מַכּ֤וֹת גְּדֹלוֹת֙ וְנֶ֣אֱמָנ֔וֹת וָחֳלָיִ֥ם רָעִ֖ים וְנֶאֱמָנִֽים׃
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.
Read Jewish philosophical commentary on Deuteronomy 28:59: and classical philosophical sources.