A desperate prayer is directed to God, asking Him to listen and bear witness to the severe blasphemy spoken against Him. He is implored to open His eyes and look closely at the events currently unfolding [מצודת ציון].
The focus of the prayer centers specifically on the messenger who delivered the threat. This envoy is the one who physically brought the letters and actively voiced the curses and insults on behalf of Sennacherib [רד״ק, מצודת דוד].