1 Chronicles 23:5

four thousand gatekeepers, [and] four thousand offering praise with the instruments that I have made for praise."

2 Chronicles 29:25-26

And he stood the Levites [in] the house of Yahweh with cymbals, harps, and lyres, according to the command of David and Gad, the seer of the king, and Nathan the prophet, for the command [was] by the hand of Yahweh by the hand of his prophets.

Amos 6:5

[Alas for those] who sing to the tune of the harp; like David they improvise on instruments of music.

1 Kings 10:12

The king made a raised structure for the house of Yahweh and for the house of the king out of the almug wood, as well as lyres and harps for the singers. [This much] almug wood has not come nor been seen [again] up to this day.

1 Chronicles 6:31-48

Now these [are the men] whom David appointed for {control of singing} in the house of Yahweh where the ark rested.

1 Chronicles 9:17-27

And the gatekeepers [were] Shallum, Akkub, Talmon, Ahiman, and their brethren (Shallum [was] the chief);

1 Chronicles 9:33

Now these [were] the singers; the heads of the {families} of the Levites [were] in the chambers free from other service, for day and night [they were] over them on the service.

1 Chronicles 15:16-24

Then David ordered the chiefs of the Levites to appoint their brothers [as] singers with instruments of song, musical instruments, stringed instruments, and cymbals, {raising their voices for joy}.

1 Chronicles 16:38

and [he left] Obed-Edom with his sixty-eight brothers. And Obed-Edom, the son of Jeduthun, and Hosah [were] gatekeepers.

1 Chronicles 16:41-42

And with them [were] Heman and Jeduthun and the remainder of those chosen, who were designated by name to give thanks to Yahweh, for his loyal love [is] everlasting.

1 Chronicles 25:1-7

And David and the commanders of the army set apart for the service the sons of Asaph, [of] Heman, and [of] Jeduthun, who prophesied with stringed instruments, with harps, and with cymbals. And their inventory of the men of the work [and] for their duty was:

1 Chronicles 26:1-12

As for the working groups of the gatekeepers: of the Korahites, Meshelemiah the son of Kore, from the sons of Asaph.

2 Chronicles 8:14

And in accord with the ordinance of David his father he appointed working groups of priests for their service, Levites for their responsibilities for praise and cultic service before the priests {according to the daily requirement}, and the gatekeepers in their working groups, gate by gate. For thus David the man of God had commanded.

2 Chronicles 20:19-21

Then the Levites, from the {Kohathites} and from the {Korahites} stood up to praise Yahweh the God of Israel with an exceedingly loud voice.

2 Chronicles 35:15

And the singers, the descendants of Asaph, [were] at their stations according to the decree of David and Asaph and Heman and Jeduthun, the seer of the king. And the gatekeepers [were] at {each gate}. They did not need to depart from their service, for their brothers the Levites had made preparations for them.

Ezra 7:7

Some of the {Israelites}, some priests and Levites, the singers, the gatekeepers, and the temple servants went up to Jerusalem in the seventh year of King Artaxerxes.

Nehemiah 7:73

So the priests, the Levites, the gatekeepers, the singers, some of the people, the temple servants, and all Israel settled in their cities. When the seventh month came, the {Israelites} [were] in their cities.

Psalm 87:7

And while dancing, singers [will sing], "All my springs [are] in you."

Treasury of Scripture Knowledge

Summary

Moreover four thousand were porters; and four thousand praised the LORD with the instruments which I made, said David, to praise therewith.

Bible References

Porters

1 Chronicles 9:17
And the gatekeepers [were] Shallum, Akkub, Talmon, Ahiman, and their brethren (Shallum [was] the chief);
1 Chronicles 15:23
And Berekiah and Elkanah [were] gatekeepers for the ark.
1 Chronicles 16:38
and [he left] Obed-Edom with his sixty-eight brothers. And Obed-Edom, the son of Jeduthun, and Hosah [were] gatekeepers.
1 Chronicles 26:1
As for the working groups of the gatekeepers: of the Korahites, Meshelemiah the son of Kore, from the sons of Asaph.
2 Chronicles 8:14
And in accord with the ordinance of David his father he appointed working groups of priests for their service, Levites for their responsibilities for praise and cultic service before the priests {according to the daily requirement}, and the gatekeepers in their working groups, gate by gate. For thus David the man of God had commanded.
2 Chronicles 35:15
And the singers, the descendants of Asaph, [were] at their stations according to the decree of David and Asaph and Heman and Jeduthun, the seer of the king. And the gatekeepers [were] at {each gate}. They did not need to depart from their service, for their brothers the Levites had made preparations for them.
Ezra 7:7
Some of the {Israelites}, some priests and Levites, the singers, the gatekeepers, and the temple servants went up to Jerusalem in the seventh year of King Artaxerxes.
Nehemiah 7:73
So the priests, the Levites, the gatekeepers, the singers, some of the people, the temple servants, and all Israel settled in their cities. When the seventh month came, the {Israelites} [were] in their cities.

Praised

1 Chronicles 6:31
Now these [are the men] whom David appointed for {control of singing} in the house of Yahweh where the ark rested.
1 Chronicles 9:33
Now these [were] the singers; the heads of the {families} of the Levites [were] in the chambers free from other service, for day and night [they were] over them on the service.
1 Chronicles 15:16
Then David ordered the chiefs of the Levites to appoint their brothers [as] singers with instruments of song, musical instruments, stringed instruments, and cymbals, {raising their voices for joy}.
1 Chronicles 16:41
And with them [were] Heman and Jeduthun and the remainder of those chosen, who were designated by name to give thanks to Yahweh, for his loyal love [is] everlasting.
1 Chronicles 25:1
And David and the commanders of the army set apart for the service the sons of Asaph, [of] Heman, and [of] Jeduthun, who prophesied with stringed instruments, with harps, and with cymbals. And their inventory of the men of the work [and] for their duty was:
2 Chronicles 20:19
Then the Levites, from the {Kohathites} and from the {Korahites} stood up to praise Yahweh the God of Israel with an exceedingly loud voice.
Psalm 87:7
And while dancing, singers [will sing], "All my springs [are] in you."

The instruments

1 Kings 10:12
The king made a raised structure for the house of Yahweh and for the house of the king out of the almug wood, as well as lyres and harps for the singers. [This much] almug wood has not come nor been seen [again] up to this day.
2 Chronicles 29:25
And he stood the Levites [in] the house of Yahweh with cymbals, harps, and lyres, according to the command of David and Gad, the seer of the king, and Nathan the prophet, for the command [was] by the hand of Yahweh by the hand of his prophets.
Amos 6:5
[Alas for those] who sing to the tune of the harp; like David they improvise on instruments of music.