1 Chronicles 24:5-6

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

6The secretary, Shemaiah son of Nethanel, a Levite, recorded them in the presence of the king and the officers, the priest Zadok, Ahimelech son of Abiathar, and the heads of families of the priests and the Levites. One ancestral family was taken for Eleazar, and then one for Ithamar.