Ernst Wilhelm Hengstenberg,
Christology of the Old Testament…
“ The city of God is unconquerable unless her inhabitants and, above all, the anointed one of God, make, by their unbelief, their glorious privilege of no avail. In the last words: "And could not fight against it," (the singular יכל because Rezin is the chief person, Rezin and Pekah being identical with Rezin with Pekah, comp. Esth. iv. 16) , the result of the siege is anticipated; and this is easily accounted for by the consideration that ver. 1 serves as an introduction to the whole account, stating, in general terms, the circumstances which induced the Prophet to come publicly forward. ”
