Albert Barnes Commentary 1 Kings 7:51

"Thus all the work that king Solomon wrought in the house of Jehovah was finished. And Solomon brought in the things which David his father had dedicated, [even] the silver, and the gold, and the vessels, and put them in the treasuries of the house of Jehovah." — 1 Kings 7:51 (ASV)

The things which David had dedicated - This included not only the items described in 1 Chronicles 28:14–18, but also the spoil from the nations he had subdued, and the vessels of gold, silver, and brass sent to him by Toi, king of Hamath, on his victory over Hadadezer. Solomon now brought these into the temple treasury. A sacred treasury had been established at least as early as the time of Saul, to which Saul himself, Abner, Joab, and others had contributed (1 Chronicles 26:28).