Reference

1 Chronicles 15:4

And David assembled the children of Aaron, and the Levites:
2

Then David said, None ought to carry the ark of God but the Levites: for them hath the Lord chosen to carry the ark of God, and to minister unto him for ever.

3

And David gathered all Israel together to Jerusalem, to bring up the ark of the Lord unto his place, which he had prepared for it.

4

And David assembled the children of Aaron, and the Levites:

5

Of the sons of Kohath; Uriel the chief, and his brethren an hundred and twenty:

6

Of the sons of Merari; Asaiah the chief, and his brethren two hundred and twenty: