Jamieson, Fausset and Brown on 2 Kings 19:36

36. So Sennacherib king of Assyria ... went and returned--the same way as he came (2Ki 19:33). The route is described (Is 10:28-32). The early chariot track near Beyrout is on the rocky edge of Lebanon, which is skirted by the ancient Lycus (Nahr-el Kelb). On the perpendicular face of the limestone rock, at different heights, are seen slabs with Assyrian inscriptions, which having been deciphered, are found to contain the name of Sennacherib. Thus, by the preservation of these tablets, the wrath of the Assyrian invaders is made to praise the Lord.

dwelt at Nineveh--This statement implies a considerable period of time, and his Annals carry on his history at least five years after his disastrous campaign at Jerusalem. No record of his catastrophe can be found, as the Assyrian practice was to record victories alone. The sculptures give only the sunny side of the picture.

2Ki 19:37. Sennacherib Slain.