Ezra 3:8 BSB

[8] In the second month of the second year after they had arrived at the house of God in Jerusalem, Zerubbabel son of Shealtiel, Jeshua son of Jozadak, and the rest of their associates including the priests, the Levites, and all who had returned to Jerusalem from the captivity, began the work. They appointed Levites twenty years of age or older to supervise the construction of the house of the LORD.