Charles Ellicott Commentary 1 Chronicles 18:9-10

"And when Tou king of Hamath heard that David had smitten all the host of Hadarezer king of Zobah, he sent Hadoram his son to king David, to salute him, and to bless him, because he had fought against Hadarezer and smitten him; (for Hadarezer had wars with Tou;) and [he had with him] all manner of vessels of gold and silver and brass." — 1 Chronicles 18:9-10 (ASV)

The King of Hamath’s embassy to David.