Luke 1:5

In the days of Herod the king of Judea, there was a certain priest by the name of Zachariah, of the class of Abijah; and his wife was of the daughters of Aaron, and her name was Elizabeth.

Luke 1:8

And when he was performing the priest's office in the order of his class before God, it fell to his lot,

Acts 13:22

and removing him, he raised up for them David for a king, of whom also he said and testified, I have found David, the son of Jesse, a man after my heart, who will do all my will.

Acts 13:36

For David, having in his generation served the will of God, fell asleep, and was gathered to his fathers and saw destruction;

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
In the days of Herod the king of Judea, there was a certain priest by the name of Zachariah, of the class of Abijah; and his wife was of the daughters of Aaron, and her name was Elizabeth.

So had david the man of god commanded

Acts 13:22
and removing him, he raised up for them David for a king, of whom also he said and testified, I have found David, the son of Jesse, a man after my heart, who will do all my will.