1 Chronicles 23:5-7

21st Century King James Version

⁵ Moreover four thousand were doorkeepers, and four thousand praised the Lord with the instruments “which I made,” said David, “to praise therewith.”

⁶ And David divided them into divisions among the sons of Levi, namely, Gershon, Kohath, and Merari.

⁷ Of the Gershonites were Laadan and Shimei.