1 Chronicles 24:3-6

Thomson(i) 3 David classed Sadok at the head of the sons of Eleazar, and Achimelech at the head of the sons of Ithamar, according to the review of them according to their service, according to the houses of their families. 4 And as the Eleazarites were found to be more numerous for chiefs of mighty men than the sons of Ithamar, therefore he distributed them; for the sons of Eleazar sixteen chiefs for houses of families, and for the sons of Ithamar chiefs for eight houses of families. 5 These he distributed by lot, one with the other. Because there were chiefs of the holies, and chiefs of the Lord, among the sons of Eleazar and among the sons of Ithamar, 6 therefore in the presence of the king and the chiefs, Samaias son of Nathaniel, the muster master of the Levites, wrote down Sadok the priest and Achimelech son of Abiathar, and the chiefs of the families of the priests and the Levites, a chief of a house of families alternately, one for Eleazar and one for Ithamar,