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2 Chronicles 31:17
and those who were listed by genealogy of the priests by their fathers’ houses, and the Levites from twenty years old and upward, in their offices by their divisions;

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2 Chronicles 31:16
in addition to those who were listed by genealogy of males, from three years old and upward, even everyone who entered into Yahweh’s house, as the duty of every day required, for their service in their offices according to their divisions;

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1 Chronicles 23:24
These were the sons of Levi after their fathers’ houses, even the heads of the fathers’ houses of those who were counted individually, in the number of names by their polls, who did the work for the service of Yahweh’s house, from twenty years old and upward.

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1 Chronicles 23:27
For by the last words of David the sons of Levi were counted, from twenty years old and upward.

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Ezra 3:8
Now in the second year of their coming to God’s house at Jerusalem, in the second month, Zerubbabel the son of Shealtiel, Jeshua the son of Jozadak, and the rest of their brothers the priests and the Levites, and all those who had come out of the captivity to Jerusalem, began the work and appointed the Levites, from twenty years old and upward, to have the oversight of the work of Yahweh’s house.

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Numbers 4:3
from thirty years old and upward even until fifty years old, all who enter into the service to do the work in the Tent of Meeting.

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Numbers 8:24
“This is what is assigned to the Levites: from twenty-five years old and upward they shall go in to wait on the service in the work of the Tent of Meeting;

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