Ezra 3:8 CSB

[8] In the second month of the second year after they arrived at God's house in Jerusalem, Zerubbabel son of Shealtiel, Jeshua son of Jozadak, and the rest of their brothers, including the priests, the Levites, and all who had returned to Jerusalem from the captivity, began to build. They appointed the Levites who were twenty years old or more to supervise the work on the LORD's house.