The Azekah Inscription is an account of an Assyrian campaign by Sargon II against Hezekiah, King of Judah. Two tablets of the inscription were discovered at Nineveh. The style of the inscription is similar to Sargon II’s “Letter to the God,” composed after his campaign to Urartu. The date of this campaign is uncertain, but it describes the conquest of Azekah (northwest of the entrance to the Elah Valley) and an unidentified city.
Mordechai Cogan, The Raging Torrent, Carta, Jerusalem, 2008. p.107-109.