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2 Chronicles 31:17
And the families of the priests were listed by their fathers' names, but the Levites, of twenty years old and over, were listed in relation to their work in their divisions;

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2 Chronicles 31:16
As well as to all the males, of three years old and over, listed by their families, who went into the house of the Lord to do what was needed day by day, for their special work with their divisions.

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1 Chronicles 23:24
These were the sons of Levi, grouped by families, the heads of the families of those who were numbered by name, by heads, all those of twenty years old and over who did the work of the house of the Lord.

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1 Chronicles 23:27
So among the last acts of David was the numbering of the sons of Levi, from twenty years old and over.

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Ezra 3:8
Now in the second year of their coming into the house of God in Jerusalem, in the second month, the work was taken in hand by 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 who had come from the land where they were prisoners to Jerusalem: and they made the Levites, of twenty years old and over, responsible for overseeing the work of the house of the Lord.

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Numbers 4:3
All those from thirty to fifty years old who are able to do the work of the Tent of meeting.

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Numbers 8:24
This is the rule for the Levites: those of twenty-five years old and over are to go in and do the work of the Tent of meeting;

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