The House of David Inscription (also known as the “Tel Dan Inscription”) was discovered in 1994 during excavations at the ancient city of Dan.
The fragment specifically mentions victories over a “king of Israel” (probably Joram) and a king of the “House of David” (probably Ahaziah).
After a few years of digging at Tel Dan, a monumental mud-brick gate was unearthed, with an arch constructed by the Canaanites in around 1850 BC - long before the Israelites arrived in the region. In those times the Dan location was called Leshem (Joshua 19:47) or Laish (Judges 18:27).
Among the city ruins, in front of the Gate were found the remnants of a large basalt stele - the largest fragment of which is 32 x 22 cm (12.5 x 8.75 inches). On this, thirteen lines of Aramaic script are partially preserved from around 825 BC, soon after the time of King Ahab of Israel and David's lineal descendant, King Jehosaphat of Judah.
The inscription was created by King Hazael of Aram-Damascus in about 825 BC,some 250 yrs after King Davids Reign, and it relates to his father, Hadad II, being victorious in battle against Jehosaphat (c. 860 BC). The most important aspect of the text, however, is that it specifically relates to Hadad defeating the "foot soldiers, charioteers and horsemen of the King of the House of David".
The much prized Tel Dan Inscription now resides in the Israel Museum, Jerusalem.
www.kchanson.com/ANCDOCS/westsem/teldan.html