1 Chronicles - Chapter 24

In this chapter we read about the allocation of duties among the priests, with the divisions arrived at by casting lots:

"With the help of Zadok, who was a descendant of Eleazar, and of Ahimelech, who was a descendant of Ithamar, David divided Aaron’s descendants into groups according to their various duties. Eleazar’s descendants were divided into sixteen groups and Ithamar’s into eight, for there were more family leaders among the descendants of Eleazar.  All tasks were assigned to the various groups by means of sacred lots so that no preference would be shown, for there were many qualified officials serving God in the sanctuary from among the descendants of both Eleazar and Ithamar. Shemaiah son of Nethanel, a Levite, acted as secretary and wrote down the names and assignments in the presence of the king, the officials, Zadok the priest, Ahimelech son of Abiathar, and the family leaders of the priests and Levites. The descendants of Eleazar and Ithamar took turns casting lots."

The seventh lot fell on Abijah.

Shortly before the birth of Jesus we read in Luke 1 about a priest from the division of Abijah:

"When Herod was king of Judea, there was a Jewish priest named Zechariah. He was a member of the priestly order of Abijah, and his wife, Elizabeth, was also from the priestly line of Aaron. ^.... One day Zechariah was serving God in the Temple, for his order was on duty that week.  As was the custom of the priests, he was chosen by lot to enter the sanctuary of the Lord and burn incense. While the incense was being burned, a great crowd stood outside, praying. While Zechariah was in the sanctuary, an angel of the Lord appeared to him, standing to the right of the incense altar. Zechariah was shaken and overwhelmed with fear when he saw him. But the angel said, “Don’t be afraid, Zechariah! God has heard your prayer. Your wife, Elizabeth, will give you a son, and you are to name him John."

When John grew up his role was to prepare the way for Jesus' ministry.