1 Chronicles 15:2-6

Then David said, “No one is to carry the ark of God except the Levites; for the Lord chose them to carry the ark of the Lord and to serve Him forever.”

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

David gathered together the sons of Aaron and the Levites:

of the sons of Kohath, Uriel the chief, and 120 of his relatives;

of the sons of Merari, Asaiah the chief, and 220 of his relatives;