1 Chronicles 24:6

Because there were chiefs of the holies, and chiefs of the Lord, among the sons of Eleazar and among the sons of Ithamar, 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,

And Samaias the son of Nathanael, the scribe, of the family of Levi, wrote them down before the king, and the princes, and Sadoc the priest, and Achimelech the son of Abiathar were present; and the heads of the families of the priests and the Levites, each of a household were assigned one to Eleazar, and one to Ithamar.