1 Chronicles 23:3 through 1 Chronicles 23:6 (NIV)
3The Levites thirty years old or more were counted, and the total number of men was thirty-eight thousand. 4David said, ?Of these, twenty-four thousand are to supervise the work of the temple of the LORD and six thousand are to be officials and judges. 5Four thousand are to be gatekeepers and four thousand are to praise the LORD with the musical instruments I have provided for that purpose.?
6David divided the Levites into groups corresponding to the sons of Levi: Gershon, Kohath and Merari.
1 Chronicles 23:30 through 1 Chronicles 23:32 (NIV)
30They were also to stand every morning to thank and praise the LORD. They were to do the same in the evening 31and whenever burnt offerings were presented to the LORD on Sabbaths and at New Moon festivals and at appointed feasts. They were to serve before the LORD regularly in the proper number and in the way prescribed for them.
32And so the Levites carried out their responsibilities for the Tent of Meeting, for the Holy Place and, under their brothers the descendants of Aaron, for the service of the temple of the LORD.
1 Chronicles 9:33 through 1 Chronicles 9:34 (NIV)
33Those who were musicians, heads of Levite families, stayed in the rooms of the temple and were exempt from other duties because they were responsible for the work day and night.
34All these were heads of Levite families, chiefs as listed in their genealogy, and they lived in Jerusalem.
Psalm 27:4 (NIV)
4 One thing I ask of the LORD,
this is what I seek:
that I may dwell in the house of the LORD
all the days of my life,
to gaze upon the beauty of the LORD
and to seek him in his temple.
The Holy Bible, New International Version
1 Chronicles 25:1 (NIV)
1David, together with the commanders of the army, set apart some of the sons of Asaph, Heman and Jeduthun for the ministry of prophesying, accompanied by harps, lyres and cymbals. Here is the list of the men who performed this service:
1 Chronicles 25:6 through 1 Chronicles 25:8 (NIV)
6All these men were under the supervision of their fathers for the music of the temple of the LORD, with cymbals, lyres and harps, for the ministry at the house of God. Asaph, Jeduthun and Heman were under the supervision of the king. 7Along with their relatives?all of them trained and skilled in music for the LORD?they numbered 288. 8Young and old alike, teacher as well as student, cast lots for their duties.