1 Esdras 1:15

15 The temple singers, the sons of Asaph, were in their place according to the arrangement made by David, and also Asaph, Zechariah, and Eddinus, who represented the king.

1 Esdras 1:15 In-Context

13 and carried them to all the people. Afterward they prepared the passover for themselves and for their kindred the priests, the sons of Aaron,
14 because the priests were offering the fat until nightfall; so the Levites prepared it for themselves and for their kindred the priests, the sons of Aaron.
15 The temple singers, the sons of Asaph, were in their place according to the arrangement made by David, and also Asaph, Zechariah, and Eddinus, who represented the king.
16 The gatekeepers were at each gate; no one needed to interrupt his daily duties, for their kindred the Levites prepared the passover for them.
17 So the things that had to do with the sacrifices to the Lord were accomplished that day: the passover was kept
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.