Ezra 3:8

Now in the second year of their coming to the house of God at Jerusalem, in the second month, Zerubbabel the son of Shealtiel, and Jeshua the son of Jozadak, and the rest of their brothers the priests and the Levites, and all those

Numbers 4:3

from thirty years old and upward even until fifty years old, all who enter upon the service, to do the work in the tent of meeting.

1 Chronicles 23:4

Of these, twenty-four thousand were to oversee the work of the house of LORD. And six thousand were officers and judges,

1 Chronicles 23:24-32

These were the sons of Levi after their fathers' houses, even the heads of the fathers of those of them that were counted, in the number of names by their polls, who did the work for the service of the house of LORD, from twenty ye

Ezra 4:3

But Zerubbabel, and Jeshua, and the rest of the heads of fathers of Israel, said to them, Ye have nothing to do with us in building a house to our God, but we ourselves together will build to LORD, the God of Israel, as king Cyrus

Treasury of Scripture Knowledge

Summary

Ezra 3:8

Now in the second year of their coming unto the house of God at Jerusalem, in the second month, began Zerubbabel the son of Shealtiel, and Jeshua the son of Jozadak, and the remnant of their brethren the priests and the Levites, and all they that were come out of the captivity unto Jerusalem; and appointed the Levites, from twenty years old and upward, to set forward the work of the house of the LORD.

Twenty years old

Numbers 4:3

1 Chronicles 23:24

Bible References

Twenty years old

from thirty years old and upward even until fifty years old, all who enter upon the service, to do the work in the tent of meeting.