'Ark of the Lord' in the Bible

David assembled all Israel at Jerusalem, to bring up the ark of the LORD to its place, which he had prepared for it.

and said to them, "You are the heads of the ancestral houses of the Levites. Sanctify yourselves, both you and your brothers, that you may bring up the ark of the LORD, the God of Israel, to the place that I have prepared for it.

So the priests and the Levites sanctified themselves to bring up the ark of the LORD, the God of Israel.

He appointed certain of the Levites to minister before the ark of the LORD, and to celebrate and to thank and praise the LORD, the God of Israel: