The chapter begins by recalling the sons of Aaron: Nadab, Abihu, Eleazar and Ithamar. Nadab and Abihu died before their father and had no children, so Eleazar and Ithamar served as priests. David, with the help of Zadok, of the line of Eleazar, and Ahimelech, of the line of Ithamar, organizes them according to their duties. It was found that the sons of Eleazar had more chiefs than those of Ithamar, and they were divided accordingly: sixteen heads of families of Eleazar and eight of Ithamar.
The groups were chosen by lot, without distinction, because there were officers of the sanctuary and officers of God among the sons of both. The scribe Shemaiah, a Levite, recorded the names before the king, the leaders, Zadok the priest, Ahimelech son of Abiathar and the heads of the priestly and Levitical families. One family of Eleazar and then one of Ithamar were drawn in turn.
The twenty-four lots are then listed, beginning with Jehoiarib, Jedaiah and Harim, and ending with Maaziah. The eighth fell to Abijah, a name that will reappear in the New Testament. This was their order of service: to enter the house of the Lord according to the procedure established by Aaron their father, as the Lord, the God of Israel, had commanded him. The last part names other descendants of Levi, and lots were cast for them too in the presence of the king, Zadok, Ahimelech and the heads of the families, without distinction between the older and the younger.