EZR 3:8

8 Now in the second year of their coming unto the Beis HaElohim at Yerushalayim, in the second month, began Zerubavel ben Sh'altiel, and Yeshua ben Yotzadak, and the she'ar [(remnant)] of their brethren the kohanim and the Levi'im, and all they that were come out of the captivity unto Yerushalayim; and appointed the Levi'im, from twenty years old and upward, to set forward the melechet Beis Hashem[(work of the construction of the Beis Hamikdash)].