Ezra 3:8 NASB

[8] Now in the second year of their coming to the house of God at Jerusalem, in the second month, Zerubbabel the son of Shealtiel, Jeshua the son of Jozadak, and the rest of their brothers the priests and the Levites, and all who came from the captivity to Jerusalem, began the work and appointed the Levites who were twenty years old and upward to oversee the work of the house of the Lord.