1 Chronicles 23:5-7

The Voice

⁵ 4,000 were gatekeepers, and 4,000 were musicians, praising Him with the instruments David made. ⁶ David divided the Levites into their families, the sons of Levi: Gershon, Kohath, and Merari.

⁷ The Gershonites had two families: Ladan and Shimei.