Luke 1:8

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

Luke 1:5

There was in the days of Herod king of Judea, a certain priest named Zacharias, of the course of Abia; and his wife was of the family of Aaron, and her name was Elisabeth.

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 Judea, a certain priest named Zacharias, of the course of Abia; and his wife was of the family of Aaron, and her name was Elisabeth.