Nehemiah 12:45-47

45And they performed the worship of their God and the service of purification; so did the singers and gatekeepers, as David and his son Solomon had commanded.

46For in the days of David and Asaph, in ancient times, there were leaders of singers, songs of praise and hymns of thanksgiving to God.

47So in the days of Zerubbabel and [later of] Nehemiah, all Israel would give the daily portions for the singers and the gatekeepers; and they set apart the consecrated portion for the Levites, and the Levites set apart the consecrated portion for the sons of Aaron [the priests].