Luke 1:8

And it came to pass, that, while he was serving as priest before God in the order of his course,

Luke 1:5

There was in the days of Herod, king of Judaea, a certain priest named Zachariah, of the course of Abijah; and he had a wife of the daughters of Aaron, and her name was Elizabeth.

Treasury of Scripture Knowledge

Summary

And it came to pass, that while he executed the priest's office before God in the order of his course,

Bible References

In

Luke 1:5
There was in the days of Herod, king of Judaea, a certain priest named Zachariah, of the course of Abijah; and he had a wife of the daughters of Aaron, and her name was Elizabeth.