8 And in the second year of their coming to the house of God at Jerusalem, in the second month, Zerubbabel the son of Shealtiel and Jeshua the son of Jozadak, and the rest of their brothers the priests and the Levites, and all they who had come out of the captivity to Jerusalem, began. And they chose the Levites, from twenty years old and upward, to set forward the work of the house of the LORD.
Ezra 3:8 Cross References - VIN
Numbers 4:3
3 All those from thirty to fifty years old who are able to do the work of the Tent of meeting.
1 Chronicles 23:4
4 David said: Of these, twenty-four thousand are to supervise the work of the LORD’s Temple and six thousand are to be officials and judges.
1 Chronicles 23:24-32
24 These were the descendants of Levi by their families, the heads of families as they were registered under their names and counted individually, that is, the workers twenty years old or more who served in the Temple of the LORD.
25 For David had said: "Since the LORD, the God of Israel, has granted rest to his people and has come to dwell in Jerusalem from generation to generation,
26 the Levites no longer need to carry the Tabernacle or any of the articles used in its service."
27 According to the last instructions of David, the Levites were counted from those twenty years old or more.
28 The duty of the Levites was to help Aaron's descendants in the service of the Temple of the LORD: to be in charge of the courtyards, the side rooms, the purification of all sacred things and the performance of other duties at the House of God.
29 They were in charge of the bread set out on the table, the flour for the grain offerings, the unleavened wafers, the baking and the mixing, and all measurements of quantity and size.
30 They were also to stand every morning to thank and praise the LORD. They were to do the same in the evening
31 and whenever burnt offerings were presented to the LORD on Sabbaths and at New Moon festivals and at appointed feasts. They were to serve before the LORD regularly in the proper number and in the way prescribed for them.
32 So the Levites carried out their responsibilities for the Tent of Meeting, for the Holy Place and, under their brothers the descendants of Aaron, for the service of the Temple of the LORD.
Ezra 4:3
3 But Zerubbabel and Jeshua and the rest of the heads of the fathers of Israel, said unto them, Ye have nothing to do with us to build a house unto our God; but we alone will build unto the LORD God of Israel as King Cyrus, the king of Persia, commanded us.