1 Chronicles 24:3-4

3With the help of aZadok of the sons of Eleazar, and Ahimelech of the sons of Ithamar, David organized them according to the appointed duties in their service. 4Since more chief men were found among the sons of Eleazar than among the sons of Ithamar, they organized them under sixteen heads of fathershouses of the sons of Eleazar, and eight of the sons of Ithamar.
Copyright information for ESV