1 Now these are the divisions of the sons of Aaron. The sons of Aaron; Nadab, and Abihu, Eleazar, and Ithamar. 2 But Nadab and Abihu died before their father, and had no children: therefore Elezar and Ithamar executed the priest's office. 3 And David distributed them, both Zadok of the sons of Eleazar, and Ahimelech of the sons of Ithamar, according to their offices in their service. 4 And there were more chief men found of the sons of Eleazar than of the sons of Ithamar; and thus were they divided. Among the sons of Eleazar there were sixteen chief men of the house of their fathers, and eight among the sons of Ithamar according to the house of their fathers. 5 Thus were they divided by lot, one sort with another; for the governors of the sanctuary, and governors of the house of God, were of the sons of Eleazar, and of the sons of Ithamar. 6 And Shemaiah the son of Nethaneel the scribe, one of the Levites, wrote them before the king, and the princes, and Zadok the priest, and Ahimelech the son of Abiathar, and before the chief of the fathers of the priests and Levites: one principal household being taken for Eleazar, and one taken for Ithamar. 7 Now the first lot came forth to Jehoiarib, the second to Jedaiah, 8 The third to Harim, the fourth to Seorim, 9 The fifth to Malchijah, the sixth to Mijamin, 10 The seventh to Hakkoz, the eighth to Abijah, 11 The ninth to Jeshua, the tenth to Shecaniah, 12 The eleventh to Eliashib, the twelfth to Jakim, 13 The thirteenth to Huppah, the fourteenth to Jeshebeab, 14 The fifteenth to Bilgah, the sixteenth to Immer, 15 The seventeenth to Hezir, the eighteenth to Aphses, 16 The nineteenth to Pethahiah, the twentieth to Jehezekel, 17 The one and twentieth to Jachin, the two and twentieth to Gamul, 18 The three and twentieth to Delaiah, the four and twentieth to Maaziah. 19 These were the orderings of them in their service to come into the house of the LORD, according to their manner, under Aaron their father, as the LORD God of Israel had commanded him. 20 And the rest of the sons of Levi were these: Of the sons of Amram; Shubael: of the sons of Shubael; Jehdeiah. 21 Concerning Rehabiah: of the sons of Rehabiah, the first was Isshiah. 22 Of the Izharites; Shelomoth: of the sons of Shelomoth; Jahath. 23 And the sons of Hebron; Jeriah the first, Amariah the second, Jahaziel the third, Jekameam the fourth. 24 Of the sons of Uzziel; Michah: of the sons of Michah; Shamir. 25 The brother of Michah was Isshiah: of the sons of Isshiah; Zechariah. 26 The sons of Merari were Mahli and Mushi: the sons of Jaaziah; Beno. 27 The sons of Merari by Jaaziah; Beno, and Shoham, and Zaccur, and Ibri. 28 Of Mahli came Eleazar, who had no sons. 29 Concerning Kish: the son of Kish was Jerahmeel. 30 The sons also of Mushi; Mahli, and Eder, and Jerimoth. These were the sons of the Levites after the house of their fathers. 31 These likewise cast lots over against their brethren the sons of Aaron in the presence of David the king, and Zadok, and Ahimelech, and the chief of the fathers of the priests and Levites, even the principal fathers over against their younger brethren.
[AD 735] Bede on 1 Chronicles 24:1
If you of the brotherhood would take delight in hearing who that Abijah was from whose priestly division it is said that Zechariah derived his rank, he was the high priest during the time of King David. By the Lord’s order, Aaron was the first single high priest appointed by Moses under the law; after his death his son, Eleazar, received the gift of the high priesthood. When he too had died, his son, Phinehas, became his successor as high priest. Thus up to the time of King David, over a period of about 470 years, one after the other became heir of the high priesthood. When David, burning with great zeal for religion, wanted to fashion a temple for the Lord, the Lord willed this to be carried out by his son Solomon instead. David himself nevertheless was concerned carefully to make ready everything that pertained to the future construction and reverent ceremonies of this temple. He also arranged for singers to chant the psalms daily at the time of sacrifice, to the tune of musical instruments. This was to arouse the minds of the people in attendance to remembrance and love of heavenly matters, not only by the sublimity of the words that were sung, but also by the sweetness of the sounds by which they were sung. Desiring that, as the worship and magnificence of the temple increased, the graceful exercise of the ministry and the assembly of those ministering might also increase, David called together all the descendants of the sons of Aaron, those descending from the stock of Eleazar and those from the stock of Ithamar, and he divided them into twenty-four sections, choosing individuals from each section as high priests; the rest, who were in the sections of the lower priesthood (which is now called that of priest), he ordered to exercise their offices with this provision, namely, that when any one of the high priests departed this life, whoever was considered the best in his section should succeed him in the high priesthood.David set up these sections in such a way that the individual high priests, along with the priests who were under them, should minister for eight successive days, that is, from sabbath to sabbath. And although all in the priestly class were equal, yet one of them who seemed to be more worthy of special reverence and more outstanding and in power was to have the name of “high priest.” As to the order that was to be observed among these sections, it was determined by the casting of lots in the presence of King David and the leading persons of the priestly and Levitical families. In this distribution of lots, it is found that Abijah, from whose priestly division and generation Zechariah sprang, occupied the eighth place. It was fitting that the herald of the new covenant, in which the glory of the resurrection was declared to the world, was born in the place of the eighth lot, both because our Lord rose from the dead on the day after the sabbath, which is the eighth day following the seven days of creation, and because we are promised at the end of time an eighth age of everlasting resurrection, following the six ages of this world and a seventh of tranquility for souls, which comes in the next life.