2 Chronicles 8:14

And he appointed, according to the ordinance of David his father, the divisions of the priests for their service, and the Levites for their charges, to praise and serve before the priests, as the duty of every day required; and the doorkeepers by their divisions at every gate: for such was the commandment of David the man of God;

1 Chronicles 9:17

And the doorkeepers: Shallum, and Akkub, and Talmon, and Ahiman, and their brethren; Shallum was the chief.

Nehemiah 12:24

And the chief Levites: Hashabiah, Sherebiah, and Jeshua the son of Kadmiel, with their brethren over against them, to praise and to give thanks, according to the commandment of David the man of God, ward over against ward.

Nehemiah 12:36

and his brethren, Shemaiah, and Azareel, Milalai, Gilalai, Maai, Nethaneel, and Judah, Hanani, with the musical instruments of David the man of God; and Ezra the scribe before them.

Deuteronomy 33:1

And this is the blessing, wherewith Moses the man of God blessed the children of Israel before his death.

2 Samuel 23:2

The Spirit of Jehovah spoke by me, And his word was on my tongue.

1 Kings 13:1

And behold, there came a man of God from Judah, by the word of Jehovah, to Bethel; and Jeroboam stood by the altar to burn incense.

1 Chronicles 6:31-48

And these are they whom David set over the service of song in the house of Jehovah after that the ark was in rest.

1 Chronicles 15:16-22

And David spoke to the chief of the Levites to appoint their brethren, the singers, with instruments of music, lutes, and harps, and cymbals, that they should sound aloud, lifting up the voice with joy.

1 Chronicles 16:4-6

And he appointed certain of the Levites to do the service before the ark of Jehovah, and to celebrate, and to thank and praise Jehovah the God of Israel:

1 Chronicles 16:42

and with them, with Heman and Jeduthun, trumpets and cymbals for those that should sound aloud; and the musical instruments of God. And the sons of Jeduthun were at the gate.

1 Chronicles 23:1-19

And David was old and full of days; and he made Solomon his son king over Israel.

1 Chronicles 28:19

All this said David, in writing, by Jehovah's hand upon me, instructing as to all the works of the pattern.

2 Chronicles 5:11

And it came to pass when the priests were come out of the holy place (for all the priests that were present were hallowed without observing the courses;

2 Chronicles 23:4

This is the thing which ye shall do: a third part of you that come in on the sabbath, of the priests and of the Levites, shall be keepers of the doors;

2 Chronicles 31:2

And Hezekiah appointed the divisions of the priests, and the Levites after their divisions, every man according to his service, as well the priests as the Levites, for burnt-offerings and for peace-offerings, to serve and to give thanks and to praise in the gates of the courts of Jehovah.

2 Chronicles 35:10

And the service was prepared, and the priests stood in their place, and the Levites in their divisions, according to the king's commandment.

Ezra 6:18

And they set the priests in their classes, and the Levites in their divisions, for the service of God, which is at Jerusalem: as it is written in the book of Moses.

Luke 1:5

There was in the days of Herod, the king of Judaea, a certain priest, by name Zacharias, of the course of Abia, and his wife of the daughters of Aaron, and her name Elizabeth.

Luke 1:8

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

Acts 13:22

And having removed him he raised up to them David for king, of whom also bearing witness he said, I have found David, the son of Jesse, a man after my heart, who shall do all my will.

Acts 13:36

For David indeed, having in his own generation ministered to the will of God, fell asleep, and was added to his fathers and saw corruption.

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.

Bible References

The courses

2 Chronicles 5:11
And it came to pass when the priests were come out of the holy place (for all the priests that were present were hallowed without observing the courses;
2 Chronicles 23:4
This is the thing which ye shall do: a third part of you that come in on the sabbath, of the priests and of the Levites, shall be keepers of the doors;
2 Chronicles 31:2
And Hezekiah appointed the divisions of the priests, and the Levites after their divisions, every man according to his service, as well the priests as the Levites, for burnt-offerings and for peace-offerings, to serve and to give thanks and to praise in the gates of the courts of Jehovah.
1 Chronicles 24:1
And the divisions of the sons of Aaron: the sons of Aaron, Nadab and Abihu, Eleazar and Ithamar.
Luke 1:5
There was in the days of Herod, the king of Judaea, a certain priest, by name Zacharias, of the course of Abia, and his wife of the daughters of Aaron, and her name Elizabeth.

The levites

2 Chronicles 35:10
And the service was prepared, and the priests stood in their place, and the Levites in their divisions, according to the king's commandment.
1 Chronicles 6:31
And these are they whom David set over the service of song in the house of Jehovah after that the ark was in rest.
1 Chronicles 15:16
And David spoke to the chief of the Levites to appoint their brethren, the singers, with instruments of music, lutes, and harps, and cymbals, that they should sound aloud, lifting up the voice with joy.
1 Chronicles 16:4
And he appointed certain of the Levites to do the service before the ark of Jehovah, and to celebrate, and to thank and praise Jehovah the God of Israel:
1 Chronicles 24:20
And as for the rest of the sons of Levi: of the sons of Amram, Shubael; of the sons of Shubael, Jehdeiah.
Ezra 6:18
And they set the priests in their classes, and the Levites in their divisions, for the service of God, which is at Jerusalem: as it is written in the book of Moses.

The porters

1 Chronicles 9:17
And the doorkeepers: Shallum, and Akkub, and Talmon, and Ahiman, and their brethren; Shallum was the chief.
1 Chronicles 26:1
The divisions of the doorkeepers. Of the Korahites: Meshelemiah the son of Kore, of the sons of Asaph.

So had david the man of god commanded

Deuteronomy 33:1
And this is the blessing, wherewith Moses the man of God blessed the children of Israel before his death.
2 Samuel 23:2
The Spirit of Jehovah spoke by me, And his word was on my tongue.
1 Kings 13:1
And behold, there came a man of God from Judah, by the word of Jehovah, to Bethel; and Jeroboam stood by the altar to burn incense.
1 Chronicles 28:19
All this said David, in writing, by Jehovah's hand upon me, instructing as to all the works of the pattern.
Acts 13:22
And having removed him he raised up to them David for king, of whom also bearing witness he said, I have found David, the son of Jesse, a man after my heart, who shall do all my will.