'Priestly' in the Bible

During the reign of King Herod of Judea, there was a priest named Zechariah, who belonged to the priestly order of Abijah. His wife was a descendant of Aaron, and her name was Elizabeth.

And it came to pass, as he fulfilled his priestly service before God in the order of his course,

according to the custom of the priestly office, he was chosen by lot to enter the temple of the Lord and burn incense.

When the days of his priestly service were ended, he went back home.