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.
Numbers 10:17
Then the House was taken down; and the sons of Gershon and the sons of Merari, who were responsible for moving the House, went forward.
Numbers 10:21
Then the Kohathites went forward with the holy place; the others put up the House ready for their coming.
1 Chronicles 23:3
And the Levites, all those of thirty years old and over, were numbered; and the number of them, by heads, man by man, was thirty-eight thousand.
Numbers 4:3
All those from thirty to fifty years old who are able to do the work of the Tent of meeting.
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;
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.
Numbers 1:2-4
Take the full number of the children of Israel, by their families, and by their fathers' houses, every male by name;
Numbers 1:18
And they got together all the people on the first day of the second month; and everyone made clear his family and his father's house, by the number of the names, from twenty years old and over.
Numbers 1:22
The generations of the sons of Simeon were numbered by their families and their fathers' houses, every male of twenty years old and over, who was able to go to war;
Numbers 2:32
These are all who were numbered of the children of Israel, in the order of their fathers' families: all the armies in their tents together came to six hundred and three thousand, five hundred and fifty.
Numbers 3:15
Let all the children of Levi be numbered by their families and their fathers' houses; let every male of a month old and over be numbered.
Numbers 3:20
And the sons of Merari by their families: Mahli and Mushi. These are the families of the Levites in the order of their fathers' houses.
Numbers 3:47
Will be five shekels for every one, by the scale of the holy place (the shekel is twenty gerahs);
Numbers 4:34-49
So Moses and Aaron and the chiefs of the people took in hand the numbering of the sons of the Kohathites, by families, in the order of their fathers' houses;
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.