And this is the number of them
Of the vessels delivered, as follows:
thirty chargers of gold, a thousand chargers of silver;
these, according to Ben Melech, were vessels in which water was put to wash hands in; but rather they were, as Aben Ezra observes from the Jerusalem Talmud F18, vessels in which they gathered the blood of lambs and bullocks slain for sacrifices:
nine and twenty knives;
which, because the handles of them were of gold or silver, were valuable, and might be very large knives, and what the priests used in slaying and cutting up the sacrifices.