1 Chronicles 15:3

David made himself houses in David’s city; and he prepared a place for God’s ark, and pitched a tent for it.

Then David said, “No one ought to carry God’s ark but the Levites. For the LORD has chosen them to carry God’s ark, and to minister to him forever.”

David gathered together the sons of Aaron and the Levites:

of the sons of Kohath, Uriel the chief, and his brothers one hundred twenty;

of the sons of Merari, Asaiah the chief, and his brothers two hundred twenty;