In these chapters David organizes the service to God in the temple. He is a type of the Lord Jesus in the future. How this service will be in the millennial kingdom of peace is described in Ezekiel 40-48. David is also a type of the Lord Jesus now, how He organizes the service in the church. Also now there are priests, on the basis of His work (1Pet 2:55you also, as living stones, are being built up as a spiritual house for a holy priesthood, to offer up spiritual sacrifices acceptable to God through Jesus Christ.; Rev 1:66and He has made us [to be] a kingdom, priests to His God and Father—to Him [be] the glory and the dominion forever and ever. Amen.). The purpose of this service is to offer sacrifices of praise, thanksgiving and worship.
If we need to give a job description of the Levites and the priests, we can say the following. Levites are given to the priests as gifts to make priestly service possible and to promote and deepen it. Priests bring sacrifices.
In principle, every believer is a Levite, not only those who serve with the Word. The Lord has entrusted each one with a certain task. The great characteristic of the Levites’ service is that they help the believers to become better priests or better worshippers and better servants. Every believer is a gift to every other believer. It is a service that believers do to each other for the purpose of better service to God.
The tasks of the Levites are mentioned in 1Chronieken 25-27. Seven tasks are mentioned, which does not mean that there are no more tasks:
1. Singers (1Chr 25:1-311Moreover, David and the commanders of the army set apart for the service [some] of the sons of Asaph and of Heman and of Jeduthun, who [were] to prophesy with lyres, harps and cymbals; and the number of those who performed their service was:2Of the sons of Asaph: Zaccur, Joseph, Nethaniah and Asharelah; the sons of Asaph [were] under the direction of Asaph, who prophesied under the direction of the king.3Of Jeduthun, the sons of Jeduthun: Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah and Mattithiah, six, under the direction of their father Jeduthun with the harp, who prophesied in giving thanks and praising the LORD.4Of Heman, the sons of Heman: Bukkiah, Mattaniah, Uzziel, Shebuel and Jerimoth, Hananiah, Hanani, Eliathah, Giddalti and Romamti-ezer, Joshbekashah, Mallothi, Hothir, Mahazioth.5All these [were] the sons of Heman the king’s seer to exalt him according to the words of God, for God gave fourteen sons and three daughters to Heman.6All these were under the direction of their father to sing in the house of the LORD, with cymbals, harps and lyres, for the service of the house of God. Asaph, Jeduthun and Heman [were] under the direction of the king.7Their number who were trained in singing to the LORD, with their relatives, all who were skillful, [was] 288.8They cast lots for their duties, all alike, the small as well as the great, the teacher [as well] as the pupil.9Now the first lot came out for Asaph to Joseph, the second for Gedaliah, he with his relatives and sons [were] twelve;10the third to Zaccur, his sons and his relatives, twelve;11the fourth to Izri, his sons and his relatives, twelve;12the fifth to Nethaniah, his sons and his relatives, twelve;13the sixth to Bukkiah, his sons and his relatives, twelve;14the seventh to Jesharelah, his sons and his relatives, twelve;15the eighth to Jeshaiah, his sons and his relatives, twelve;16the ninth to Mattaniah, his sons and his relatives, twelve;17the tenth to Shimei, his sons and his relatives, twelve;18the eleventh to Azarel, his sons and his relatives, twelve;19the twelfth to Hashabiah, his sons and his relatives, twelve;20for the thirteenth, Shubael, his sons and his relatives, twelve;21for the fourteenth, Mattithiah, his sons and his relatives, twelve;22for the fifteenth to Jeremoth, his sons and his relatives, twelve;23for the sixteenth to Hananiah, his sons and his relatives, twelve;24for the seventeenth to Joshbekashah, his sons and his relatives, twelve;25for the eighteenth to Hanani, his sons and his relatives, twelve;26for the nineteenth to Mallothi, his sons and his relatives, twelve;27for the twentieth to Eliathah, his sons and his relatives, twelve;28for the twenty-first to Hothir, his sons and his relatives, twelve;29for the twenty-second to Giddalti, his sons and his relatives, twelve;30for the twenty-third to Mahazioth, his sons and his relatives, twelve;31for the twenty-fourth to Romamti-ezer, his sons and his relatives, twelve.)
2. Division of the gatekeepers (1Chr 26:1-191For the divisions of the gatekeepers [there were] of the Korahites, Meshelemiah the son of Kore, of the sons of Asaph.2Meshelemiah had sons: Zechariah the firstborn, Jediael the second, Zebadiah the third, Jathniel the fourth,3Elam the fifth, Johanan the sixth, Eliehoenai the seventh.4Obed-edom had sons: Shemaiah the firstborn, Jehozabad the second, Joah the third, Sacar the fourth, Nethanel the fifth,5Ammiel the sixth, Issachar the seventh [and] Peullethai the eighth; God had indeed blessed him.6Also to his son Shemaiah sons were born who ruled over the house of their father, for they were mighty men of valor.7The sons of Shemaiah [were] Othni, Rephael, Obed and Elzabad, whose brothers, Elihu and Semachiah, were valiant men.8All these [were] of the sons of Obed-edom; they and their sons and their relatives [were] able men with strength for the service, 62 from Obed-edom.9Meshelemiah had sons and relatives, 18 valiant men.10Also Hosah, [one] of the sons of Merari had sons: Shimri the first (although he was not the firstborn, his father made him first),11Hilkiah the second, Tebaliah the third, Zechariah the fourth; all the sons and relatives of Hosah [were] 13.12To these divisions of the gatekeepers, the chief men, [were given] duties like their relatives to minister in the house of the LORD.13They cast lots, the small and the great alike, according to their fathers’ households, for every gate.14The lot to the east fell to Shelemiah. Then they cast lots [for] his son Zechariah, a counselor with insight, and his lot came out to the north.15For Obed-edom [it fell] to the south, and to his sons went the storehouse.16For Shuppim and Hosah [it was] to the west, by the gate of Shallecheth, on the ascending highway. Guard corresponded to guard.17On the east there were six Levites, on the north four daily, on the south four daily, and at the storehouse two by two.18At the Parbar on the west [there were] four at the highway and two at the Parbar.19These were the divisions of the gatekeepers of the sons of Korah and of the sons of Merari.)
3. Keepers of the treasure (1Chr 26:20-2820The Levites, their relatives, had charge of the treasures of the house of God and of the treasures of the dedicated gifts.21The sons of Ladan, the sons of the Gershonites belonging to Ladan, [namely], the Jehielites, [were] the heads of the fathers’ [households], belonging to Ladan the Gershonite.22The sons of Jehieli, Zetham and Joel his brother, had charge of the treasures of the house of the LORD.23As for the Amramites, the Izharites, the Hebronites and the Uzzielites,24Shebuel the son of Gershom, the son of Moses, was officer over the treasures.25His relatives by Eliezer [were] Rehabiah his son, Jeshaiah his son, Joram his son, Zichri his son and Shelomoth his son.26This Shelomoth and his relatives had charge of all the treasures of the dedicated gifts which King David and the heads of the fathers’ [households], the commanders of thousands and hundreds, and the commanders of the army, had dedicated.27They dedicated part of the spoil won in battles to repair the house of the LORD.28And all that Samuel the seer had dedicated and Saul the son of Kish, Abner the son of Ner and Joab the son of Zeruiah, everyone who had dedicated [anything, all of this] was in the care of Shelomoth and his relatives.)
4. Officers and judges (1Chr 26:29-3229As for the Izharites, Chenaniah and his sons were [assigned] to outside duties for Israel, as officers and judges.30As for the Hebronites, Hashabiah and his relatives, 1,700 capable men, had charge of the affairs of Israel west of the Jordan, for all the work of the LORD and the service of the king.31As for the Hebronites, Jerijah the chief (these Hebronites were investigated according to their genealogies and fathers’ [households], in the fortieth year of David’s reign, and men of outstanding capability were found among them at Jazer of Gilead)32and his relatives, capable men, [were] 2,700 in number, heads of fathers’ [households]. And King David made them overseers of the Reubenites, the Gadites and the half-tribe of the Manassites concerning all the affairs of God and of the king.)
5. Commanders of the army (1Chr 27:1-151Now [this is] the enumeration of the sons of Israel, the heads of fathers’ [households], the commanders of thousands and of hundreds, and their officers who served the king in all the affairs of the divisions which came in and went out month by month throughout all the months of the year, each division [numbering] 24,000:2Jashobeam the son of Zabdiel had charge of the first division for the first month; and in his division [were] 24,000.3[He was] from the sons of Perez, [and was] chief of all the commanders of the army for the first month.4Dodai the Ahohite and his division had charge of the division for the second month, Mikloth [being] the chief officer; and in his division [were] 24,000.5The third commander of the army for the third month [was] Benaiah, the son of Jehoiada the priest, [as] chief; and in his division [were] 24,000.6This Benaiah [was] the mighty man of the thirty, and had charge of thirty; and over his division was Ammizabad his son.7The fourth for the fourth month [was] Asahel the brother of Joab, and Zebadiah his son after him; and in his division [were] 24,000.8The fifth for the fifth month [was] the commander Shamhuth the Izrahite; and in his division [were] 24,000.9The sixth for the sixth month [was] Ira the son of Ikkesh the Tekoite; and in his division [were] 24,000.10The seventh for the seventh month [was] Helez the Pelonite of the sons of Ephraim; and in his division [were] 24,000.11The eighth for the eighth month [was] Sibbecai the Hushathite of the Zerahites; and in his division [were] 24,000.12The ninth for the ninth month [was] Abiezer the Anathothite of the Benjamites; and in his division [were] 24,000.13The tenth for the tenth month [was] Maharai the Netophathite of the Zerahites; and in his division [were] 24,000.14The eleventh for the eleventh month [was] Benaiah the Pirathonite of the sons of Ephraim; and in his division [were] 24,000.15The twelfth for the twelfth month [was] Heldai the Netophathite of Othniel; and in his division [were] 24,000.)
6. Chief officers of the tribes (1Chr 27:16-2416Now in charge of the tribes of Israel: chief officer for the Reubenites was Eliezer the son of Zichri; for the Simeonites, Shephatiah the son of Maacah;17for Levi, Hashabiah the son of Kemuel; for Aaron, Zadok;18for Judah, Elihu, [one] of David’s brothers; for Issachar, Omri the son of Michael;19for Zebulun, Ishmaiah the son of Obadiah; for Naphtali, Jeremoth the son of Azriel;20for the sons of Ephraim, Hoshea the son of Azaziah; for the half-tribe of Manasseh, Joel the son of Pedaiah;21for the half-tribe of Manasseh in Gilead, Iddo the son of Zechariah; for Benjamin, Jaasiel the son of Abner;22for Dan, Azarel the son of Jeroham. These [were] the princes of the tribes of Israel.23But David did not count those twenty years of age and under, because the LORD had said He would multiply Israel as the stars of heaven.24Joab the son of Zeruiah had begun to count [them], but did not finish; and because of this, wrath came upon Israel, and the number was not included in the account of the chronicles of King David.)
7. Other officials and counsellors (1Chr 27:25-3425Now Azmaveth the son of Adiel had charge of the king’s storehouses. And Jonathan the son of Uzziah had charge of the storehouses in the country, in the cities, in the villages and in the towers.26Ezri the son of Chelub had charge of the agricultural workers who tilled the soil.27Shimei the Ramathite had charge of the vineyards; and Zabdi the Shiphmite had charge of the produce of the vineyards [stored] in the wine cellars.28Baal-hanan the Gederite had charge of the olive and sycamore trees in the Shephelah; and Joash had charge of the stores of oil.29Shitrai the Sharonite had charge of the cattle which were grazing in Sharon; and Shaphat the son of Adlai had charge of the cattle in the valleys.30Obil the Ishmaelite had charge of the camels; and Jehdeiah the Meronothite had charge of the donkeys.31Jaziz the Hagrite had charge of the flocks. All these were overseers of the property which belonged to King David.32Also Jonathan, David’s uncle, [was] a counselor, a man of understanding, and a scribe; and Jehiel the son of Hachmoni tutored the king’s sons.33Ahithophel [was] counselor to the king; and Hushai the Archite [was] the king’s friend.34Jehoiada the son of Benaiah, and Abiathar succeeded Ahithophel; and Joab was the commander of the king’s army.)