1 Chronicles 24:5-6

5Thus they were divided by lot, for there were officers of the sanctuary and officers of God among both Eleazar’s and Ithamar’s descendants.

6The scribe, Shemaiah son of Nethanel, a Levite, recorded their names in the presence of the king and of the officers: Zadok the priest, Ahimelech son of Abiathar, and the heads of families of the priests and the Levites—one family being taken from Eleazar, and then one from Ithamar.