1 Chronicles 25:3

Of Jeduthun; the sons of Jeduthun: Gedaliah, and Zeri, and Jeshaiah, Hashabiah, and Mattithiah, six, under the hands of their father Jeduthun with the harp, who prophesied in giving thanks and praising Jehovah.

1 Chronicles 16:41-42

and with them Heman and Jeduthun, and the rest that were chosen, who were mentioned by name, to give thanks to Jehovah, because his lovingkindness endureth for ever;

1 Chronicles 9:16

and Obadiah the son of Shemaiah, the son of Galal, the son of Jeduthun, and Berechiah the son of Asa, the son of Elkanah, that dwelt in the villages of the Netophathites.

1 Chronicles 15:18

and with them their brethren of the second degree, Zechariah, Ben, and Jaaziel, and Shemiramoth, and Jehiel, and Unni, Eliab, and Benaiah, and Maaseiah, and Mattithiah, and Eliphelehu, and Mikneiah, and Obed-edom, and Jeiel, the doorkeepers.

1 Chronicles 15:21

and Mattithiah, and Eliphelehu, and Mikneiah, and Obed-edom, and Jeiel, and Azaziah, with harps set to the Sheminith, to lead.

1 Chronicles 25:21

for the fourteenth, Mattithiah, his sons and his brethren, twelve:

2 Chronicles 29:14

and of the sons of Heman, Jehuel and Shimei; and of the sons of Jeduthun, Shemaiah and Uzziel.

Psalm 92:1

It is a good thing to give thanks unto Jehovah, And to sing praises unto thy name, O Most High;

Jeremiah 33:11

the voice of joy and the voice of gladness, the voice of the bridegroom and the voice of the bride, the voice of them that say, Give thanks to Jehovah of hosts, for Jehovah is good, for his lovingkindness endureth for ever; and of them that bring'sacrifices of thanksgiving into the house of Jehovah. For I will cause the captivity of the land to return as at the first, saith Jehovah.

Treasury of Scripture Knowledge

Summary

Of Jeduthun: the sons of Jeduthun; Gedaliah, and Zeri, and Jeshaiah, Hashabiah, and Mattithiah, six, under the hands of their father Jeduthun, who prophesied with a harp, to give thanks and to praise the LORD.

General references

Bible References

Gedaliah

1 Chronicles 25:9
Now the first lot came forth for Asaph to Joseph: the second to Gedaliah; he and his brethren and sons were twelve:

Jeshaiah

1 Chronicles 25:15
the eighth to Jeshaiah, his sons and his brethren, twelve:

Mattithiah

1 Chronicles 25:21
for the fourteenth, Mattithiah, his sons and his brethren, twelve:
1 Chronicles 15:18
and with them their brethren of the second degree, Zechariah, Ben, and Jaaziel, and Shemiramoth, and Jehiel, and Unni, Eliab, and Benaiah, and Maaseiah, and Mattithiah, and Eliphelehu, and Mikneiah, and Obed-edom, and Jeiel, the doorkeepers.

General references

Numbers 3:20
And the sons of Merari by their families: Mahli and Mushi. These are the families of the Levites according to their fathers houses.
Psalm 98:5
Sing praises unto Jehovah with the harp; With the harp and the voice of melody.

American Standard Version Public Domain