1 Chronicles 23:24

Now the Levites were numbered from the age of thirty years and upward: and their number by their polls, man by man, was thirty and eight thousand.

And the tabernacle was taken down; and the sons of Gershon and the sons of Merari set forward, bearing the tabernacle.

And the Kohathites set forward, bearing the sanctuary: and the other did set up the tabernacle against they came.

From thirty years old and upward even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.

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.

This is it that belongeth unto the Levites: from twenty and five years old and upward they shall go in to wait upon the service of the tabernacle of the congregation:

For by the last words of David the Levites were numbered from twenty years old and above:

And they assembled all the congregation together on the first day of the second month, and they declared their pedigrees after their families, by the house of their fathers, according to the number of the names, from twenty years old and upward, by their polls.

Take ye the sum of all the congregation of the children of Israel, after their families, by the house of their fathers, with the number of their names, every male by their polls; From twenty years old and upward, all that are able to go forth to war in Israel: thou and Aaron shall number them by their armies. And with you there shall be a man of every tribe; every one head of the house of his fathers.

Of the children of Simeon, by their generations, after their families, by the house of their fathers, those that were numbered of them, according to the number of the names, by their polls, every male from twenty years old and upward, all that were able to go forth to war;

These are those which were numbered of the children of Israel by the house of their fathers: all those that were numbered of the camps throughout their hosts were six hundred thousand and three thousand and five hundred and fifty.

Number the children of Levi after the house of their fathers, by their families: every male from a month old and upward shalt thou number them.

And the sons of Merari by their families; Mahli, and Mushi. These are the families of the Levites according to the house of their fathers.

Thou shalt even take five shekels apiece by the poll, after the shekel of the sanctuary shalt thou take them: (the shekel is twenty gerahs:)

And Moses and Aaron and the chief of the congregation numbered the sons of the Kohathites after their families, and after the house of their fathers, From thirty years old and upward even unto fifty years old, every one that entereth into the service, for the work in the tabernacle of the congregation: And those that were numbered of them by their families were two thousand seven hundred and fifty. These were they that were numbered of the families of the Kohathites, all that might do service in the tabernacle of the congregation, which Moses and Aaron did number according to the commandment of the Lord by the hand of Moses. And those that were numbered of the sons of Gershon, throughout their families, and by the house of their fathers, From thirty years old and upward even unto fifty years old, every one that entereth into the service, for the work in the tabernacle of the congregation, Even those that were numbered of them, throughout their families, by the house of their fathers, were two thousand and six hundred and thirty. These are they that were numbered of the families of the sons of Gershon, of all that might do service in the tabernacle of the congregation, whom Moses and Aaron did number according to the commandment of the Lord. And those that were numbered of the families of the sons of Merari, throughout their families, by the house of their fathers, From thirty years old and upward even unto fifty years old, every one that entereth into the service, for the work in the tabernacle of the congregation, Even those that were numbered of them after their families, were three thousand and two hundred. These be those that were numbered of the families of the sons of Merari, whom Moses and Aaron numbered according to the word of the Lord by the hand of Moses. All those that were numbered of the Levites, whom Moses and Aaron and the chief of Israel numbered, after their families, and after the house of their fathers, From thirty years old and upward even unto fifty years old, every one that came to do the service of the ministry, and the service of the burden in the tabernacle of the congregation, Even those that were numbered of them, were eight thousand and five hundred and fourscore. According to the commandment of the Lord they were numbered by the hand of Moses, every one according to his service, and according to his burden: thus were they numbered of him, as the Lord commanded Moses.