וְהָיִ֖יתָ מְשֻׁגָּ֑ע מִמַּרְאֵ֥ה עֵינֶ֖יךָ אֲשֶׁ֥ר תִּרְאֶֽה׃
so that thou shalt be mad for the sight of thine eyes which thou shalt see.
Targum Jonathan on Deuteronomy
And you will be maddened by the vengeance, and shaken by the sight of your eyes that you will see.