Rashi on Deuteronomy 28:25/רש"י על דברים כ״ח:כ״ה

1לזעוה [AND THOU SHALT] BECOME A זעוה, i.e. a cause of fright and trembling: it means that all who will hear of thy afflictions will tremblingly move away from you and will say, “Woe upon us, would that there should not befall us as has befallen them!”