וְהֵשִׁ֣יב בְּךָ֗ אֵ֚ת כָּל־מַדְוֵ֣ה מִצְרַ֔יִם אֲשֶׁ֥ר יָגֹ֖רְתָּ מִפְּנֵיהֶ֑ם וְדָבְק֖וּ בָּֽךְ׃
And He will bring back upon thee all the diseases of Egypt, which thou wast in dread of; and they shall cleave unto thee.
Read kabbalistic (mystical) interpretation of Deuteronomy 28:60: and classical mystical sources.