Metzudat David on II Kings
He didn't want to speak with the woman face to face.
Rashi on II Kings
With all this attention. To put your heart into this task, as in, “and shudders [=וחרד] concerning My word,”14Yeshayahu 66:2. [i.e.,] is diligent concerning the task that it be accomplished, and puts his heart into it.