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.

Luke 1:8

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

Acts 13:22

And having removed him, He raised up David for their king, to whom also He gave testimony and said, I have found David the son of Jesse, a man after my own heart, who will perform all my will.

Acts 13:36

Now David having served his own generation according to the will of God, fell asleep, and was laid with his fathers, and saw corruption: but He whom God raised,

Treasury of Scripture Knowledge

Summary

And he appointed, according to the order of David his father, the courses of the priests to their service, and the Levites to their charges, to praise and minister before the priests, as the duty of every day required: the porters also by their courses at every gate: for so had David the man of God commanded.

The courses

So had david the man of god commanded

Bible References

The courses

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.

So had david the man of god commanded

Acts 13:22
And having removed him, He raised up David for their king, to whom also He gave testimony and said, I have found David the son of Jesse, a man after my own heart, who will perform all my will.