Nehemiah 7:44
The singers: the descendants of Asaph, 148.

1 Chronicles 6:31-32
These are the men David put in charge of the music in the house of the LORD after the ark rested there. / They ministered with song before the tabernacle, the Tent of Meeting, until Solomon built the house of the LORD in Jerusalem. And they performed their duties according to the regulations given them.

1 Chronicles 9:33
Those who were musicians, the heads of Levite families, stayed in the temple chambers and were exempt from other duties because they were on duty day and night.

2 Chronicles 5:12
all the Levitical singers—Asaph, Heman, Jeduthun, and their sons and relatives—stood on the east side of the altar, dressed in fine linen and playing cymbals, harps, and lyres, accompanied by 120 priests sounding trumpets.

2 Chronicles 29:25-30
Hezekiah stationed the Levites in the house of the LORD with cymbals, harps, and lyres according to the command of David, of Gad the king’s seer, and of Nathan the prophet. For the command had come from the LORD through His prophets. / The Levites stood with the instruments of David, and the priests with the trumpets. / And Hezekiah ordered that the burnt offering be sacrificed on the altar. When the burnt offering began, the song of the LORD and the trumpets began as well, accompanied by the instruments of David king of Israel. ...

2 Chronicles 35:15
The singers, the descendants of Asaph, were at their stations according to the command of David, Asaph, Heman, and Jeduthun the king’s seer. And the gatekeepers at each gate did not need to leave their posts, because their fellow Levites made preparations for them.

Nehemiah 12:28-29
The singers were also assembled from the region around Jerusalem, from the villages of the Netophathites, / from Beth-gilgal, and from the fields of Geba and Azmaveth, for they had built villages for themselves around Jerusalem.

Nehemiah 12:45-47
They performed the service of their God and the service of purification, along with the singers and gatekeepers, as David and his son Solomon had prescribed. / For long ago, in the days of David and Asaph, there were directors for the singers and for the songs of praise and thanksgiving to God. / So in the days of Zerubbabel and Nehemiah, all Israel contributed the daily portions for the singers and gatekeepers. They also set aside daily portions for the Levites, and the Levites set aside daily portions for the descendants of Aaron.

1 Chronicles 15:16-22
David also told the leaders of the Levites to appoint their relatives as singers to lift up their voices with joy, accompanied by musical instruments—harps, lyres, and cymbals. / So the Levites appointed Heman son of Joel; from his brothers, Asaph son of Berechiah; from their brothers the Merarites, Ethan son of Kushaiah; / and with them their brothers next in rank: Zechariah, Jaaziel, Shemiramoth, Jehiel, Unni, Eliab, Benaiah, Maaseiah, Mattithiah, Eliphelehu, Mikneiah, and the gatekeepers Obed-edom and Jeiel. ...

1 Chronicles 16:4-6
David appointed some of the Levites to minister before the ark of the LORD, to celebrate, to give thanks, and to praise the LORD, the God of Israel. / Asaph was the chief, Zechariah was second, then Jeiel, Shemiramoth, Jehiel, Mattithiah, Eliab, Benaiah, Obed-edom, and Jeiel. They were to play the harps and lyres, while Asaph sounded the cymbals / and the priests Benaiah and Jahaziel blew the trumpets regularly before the ark of the covenant of God.

1 Chronicles 25:1-7
Additionally, David and the commanders of the army set apart some of the sons of Asaph, Heman, and Jeduthun to prophesy with the accompaniment of lyres, harps, and cymbals. The following is the list of the men who performed this service: / From the sons of Asaph: Zaccur, Joseph, Nethaniah, and Asarelah. These sons of Asaph were under the direction of Asaph, who prophesied under the direction of the king. / From the sons of Jeduthun: Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah, and Mattithiah—six in all—under the direction of their father Jeduthun, who prophesied with the harp, giving thanks and praise to the LORD. ...

2 Chronicles 8:14
In keeping with the ordinances of his father David, Solomon appointed the divisions of the priests over their service, and the Levites for their duties to offer praise and to minister before the priests according to the daily requirement. He also appointed gatekeepers by their divisions at each gate, for this had been the command of David, the man of God.

2 Chronicles 23:18
Moreover, Jehoiada put the oversight of the house of the LORD into the hands of the Levitical priests, whom David had appointed over the house of the LORD, to offer burnt offerings to the LORD as written in the Law of Moses, with rejoicing and song, as ordained by David.

2 Chronicles 31:2
Hezekiah reestablished the divisions of the priests and Levites—each of them according to their duties as priests or Levites—for the burnt offerings and peace offerings, for ministry, for giving thanks, and for singing praises at the gates of the LORD’s dwelling.

Psalm 134:1-2
A song of ascents. Come, bless the LORD, all you servants of the LORD who serve by night in the house of the LORD! / Lift up your hands to the sanctuary and bless the LORD!