2 Chronicles 35:15
The singers, the sons of Asaph, were in their place according to the command of David, and Asaph, and Heman, and Jeduthun the king's seer; and the gatekeepers were at each gate. They did not need to depart from their service, for their brothers the Levites prepared for them.
1 Chronicles 9:17-19
The gatekeepers were Shallum, Akkub, Talmon, Ahiman, and their kinsmen (Shallum was the chief);
1 Chronicles 25:1-7
David and the chiefs of the service also set apart for the service the sons of Asaph, and of Heman, and of Jeduthun, who prophesied with lyres, with harps, and with cymbals. The list of those who did the work and of their duties was:
1 Chronicles 26:12-19
These divisions of the gatekeepers, corresponding to their chief men, had duties, just as their brothers did, ministering in the house of the LORD.
1 Chronicles 16:41-42
With them were Heman and Jeduthun and the rest of those chosen and expressly named to give thanks to the LORD, for his steadfast love endures forever.
1 Chronicles 23:5
4,000 gatekeepers, and 4,000 shall offer praises to the LORD with the instruments that I have made for praise."
2 Chronicles 29:25-26
And he stationed the Levites in the house of the LORD with cymbals, harps, and lyres, according to the commandment of David and of Gad the king's seer and of Nathan the prophet, for the commandment was from the LORD through his prophets.
Psalm 77:1
I cry aloud to God, aloud to God, and he will hear me.
Psalm 78:1
Give ear, O my people, to my teaching; incline your ears to the words of my mouth!
Psalm 79:1
O God, the nations have come into your inheritance; they have defiled your holy temple; they have laid Jerusalem in ruins.