1 Chronicles 23:24
These were the sons of Levi after the house of their fathers; even the chief of the fathers, as they were counted by number of names by their polls, that did the work for the service of the house of the Lord, from the age of twenty years and upward. (1 Chronicles 23:24)
R25 Numbers 10:17, Numbers 10:21  R01 1 Chronicles 23:3  R02 2 Chronicles 31:17, Ezra 3:8, 1 Chronicles 23:3, Numbers 4:3, Numbers 8:24
Numbers 10:17, 21
Numbers 10:17 And the tabernacle was taken down; and the sons of Gershon and the sons of Merari set forward, bearing the tabernacle. 10 I MC VC
Numbers 10:21 And the Kohathites set forward, bearing the sanctuary: and the other did set up the tabernacle against they came. 10 I MC VC
1 Chronicles 23:3 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. MC VC
Numbers 4:3
Numbers 4:3 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. 10 I MC VC
Numbers 8:24
Numbers 8:24 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: 10 I MC VC
1 Chronicles 23:3
1 Chronicles 23:3 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. MC VC
2 Chronicles 31:17
2 Chronicles 31:17 Both to the genealogy of the priests by the house of their fathers, and the Levites from twenty years old and upward, in their charges by their courses; MC VC
Ezra 3:8
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. MC VC