Passage cross-references.

And the porters were, Shallum, and Akkub, and Talmon, and Ahiman, and their brethren: Shallum was the chief;

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

And the chief of the 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.

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

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

The Spirit of the LORD spake by me, and his word was in my tongue.

And, behold, there came a man of God out of Judah by the word of the LORD unto Bethel: and Jeroboam stood by the altar to burn incense.

And these are they whom David set over the service of song in the house of the LORD, after that the ark had rest. …

And David spake to the chief of the Levites to appoint their brethren to be the singers with instruments of musick, psalteries and harps and cymbals, sounding, by lifting up the voice with joy. …

And he appointed certain of the Levites to minister before the ark of the LORD, and to record, and to thank and praise the LORD God of Israel: …

And with them Heman and Jeduthun with trumpets and cymbals for those that should make a sound, and with musical instruments of God. And the sons of Jeduthun were porters.

So when David was old and full of days, he made Solomon his son king over Israel. …

All this, said David, the LORD made me understand in writing by his hand upon me, even all the works of this pattern.

And it came to pass, when the priests were come out of the holy place: (for all the priests that were present were sanctified, and did not then wait by course:

This is the thing that ye shall do; A third part of you entering on the sabbath, of the priests and of the Levites, shall be porters of the doors;

And Hezekiah appointed the courses of the priests and the Levites after their courses, every man according to his service, the priests and Levites for burnt offerings and for peace offerings, to minister, and to give thanks, and to praise in the gates of the tents of the LORD.

So the service was prepared, and the priests stood in their place, and the Levites in their courses, according to the king’s commandment.

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

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

And when he had removed him, he raised up unto them David to be their king; to whom also he gave testimony, and said, I have found David the son of Jesse, a man after mine own heart, which shall fulfil all my will.

For David, after he had served his own generation by the will of God, fell on sleep, and was laid unto his fathers, and saw corruption: