Ibn Ezra on Isaiah
ואכהו And smote him, namely, my people (ver. 14), or him that is of a contrite and humble spirit (ver. 15). It is the imperfect, for which the Hebrew language has no special form.28Comp. I. E. on 1:21, and Note 43.
Rashi on Isaiah
I became wroth at the beginning and I smote him, always hiding My face from his distress and I was wroth for he went rebelliously in the way of his heart. Transpose the verse and explain it thus: For the iniquity of his thievery and the fact that he went rebelliously in the way of his heart, I became wroth and smote him.