'Ark of the Lord' in the Bible

And 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 fathers’ households of the Levites; consecrate yourselves both you and your relatives, that you may bring up the ark of the Lord God of Israel to the place that I have prepared for it.

So the priests and the Levites consecrated themselves to bring up the ark of the Lord God of Israel.

He appointed some of the Levites as ministers before the ark of the Lord, even to celebrate and to thank and praise the Lord God of Israel: