1 Chronicles 9:33
And these are the singers, chief of the fathers of the Levites, who remaining in the chambers were free: for they were employed in that work day and night.
1 Chronicles 6:31-33
And these are they whom David set over the service of song in the house of the LORD, after that the ark had rest.
1 Chronicles 25:1-31
Moreover David and the captains of the host separated to the service of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with psalteries, and with cymbals: and the number of the workmen according to their service was:
1 Chronicles 15:16-22
And David spoke to the chief of the Levites to appoint their brethren to be the singers with instruments of music, psalteries, and harps, and cymbals, sounding, by lifting up the voice with joy.
1 Chronicles 16:4-6
And he appointed certain of the Levites to minister before the ark of the LORD, and to record, and to thank and praise the LORD God of Israel:
Ezra 7:24
Also we certify you, that concerning any of the priests and Levites, singers, porters, Nethinims, or ministers of this house of God, it shall not be lawful to impose toll, tribute, or custom upon them.
Nehemiah 11:17
And Mattaniah the son of Micha, the son of Zabdi, the son of Asaph, was the principal to begin the thanksgiving in prayer: and Bakbukiah the second among his brethren, and Abda the son of Shammua, the son of Galal, the son of Jeduthun.
Nehemiah 11:22-23
The overseer also of the Levites at Jerusalem was Uzzi the son of Bani, the son of Hashabiah, the son of Mattaniah, the son of Micha. Of the sons of Asaph, the singers were over the business of the house of God.
Psalm 134:1-2
A Song of degrees. Behold, bless ye the LORD, all ye servants of the LORD, who by night stand in the house of the LORD.
Psalm 135:1-3
Praise ye the LORD. Praise ye the name of the LORD; praise him, O ye servants of the LORD.