Jamieson-Fausset-Brown Bible Commentary

when he heard say of Tirhakah . . ., Behold, he is come out to fight against thee, &c.--This was the "rumor" to which Isaiah referred [Kg2 19:7]. Tirhakah reigned in Upper Egypt, while So (or Sabaco) ruled in Lower Egypt. He was a powerful monarch, another Sesostris, and both he and Sabaco have left many monuments of their greatness. The name and figure of Tirhakah receiving war captives, are still seen in the Egyptian temple of Medinet Abou. This was the expected succor which was sneered at by Rab-shakeh as "a bruised reed" (Kg2 18:21). Rage against Hezekiah for allying himself with Egypt, or the hope of being better able to meet this attack from the south, induced him, after hearing the rumor of Tirhakah's advance, to send a menacing letter to Hezekiah, in order that he might force the king of Judah to an immediate surrender of his capital. This letter, couched in the same vaunting and imperious style as the speech of Rab-shakeh, exceeded it in blasphemy, and contained a larger enumeration of conquered places, with the view of terrifying Hezekiah and showing him the utter hopelessness of all attempts at resistance.