Ezra 3:8

Two years and two months after arriving at the site of the Temple of God in Jerusalem, Shealtiel's son Zerubbabel, Jozadak's son Jeshua, the relatives of the priests and descendants of Levi, and everyone else who had left the Babylonian captivity for Jerusalem appointed descendants of Levi who were 20 years old and older to oversee the work of the LORD's Temple.

Numbers 4:3

from 30 years and older through the age of 50 years, from everyone who can enter the service to perform work at the Tent of Meeting.

1 Chronicles 23:4

"24,000 of these," David said, "are to be set in charge of the work of the Temple of the LORD, with 6,000 serving as officers and judges,

1 Chronicles 23:24-32

These were the descendants of Levi according to their ancestral households, with family heads documented according to the names of persons 20 years and older who were appointed to perform work in service to the Temple of the LORD.

Ezra 4:3

But Zerubbabel, Jeshua, and the rest of the heads of the families of Israel replied, "You have no part in our plans for building a temple to our God, because we alone will build to the LORD, the God of Israel, in accordance with the decree issued by King Cyrus, king of Persia."

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 30 years and older through the age of 50 years, from everyone who can enter the service to perform work at the Tent of Meeting.