What does Ezra 8:26 mean?

So we fasted and begged our God for this: and he granted our request.

Then I set apart twelve of the chiefs of the priests, even Sherebiah, Hashabiah, and ten of their brothers with them,

and weighed to them the silver, the gold, and the vessels, even the offering for the house of our God, which the king, his counselors, his princes, and all Israel there present, had offered.

twenty bowls of gold weighing one thousand darics; and two vessels of fine bright brass, precious as gold.

I said to them, “You are holy to Yahweh, and the vessels are holy. The silver and the gold are a freewill offering to Yahweh, the God of your fathers.

Watch and keep them, until you weigh them before the chiefs of the priests and the Levites, and the princes of the fathers’ households of Israel, at Jerusalem, in the rooms of Yahweh’s house.”