1 Chronicles 23:3
And the Levites were numbered from thirty years old and upward; and their number, by their polls, man by man, was thirty-eight thousand.
1 Chronicles 23:24
These were the sons of Levi according to their fathers' houses, the chief fathers, as they were reckoned, by number of names by their polls, who did the work of the service of the house of Jehovah, from twenty years old and upward.
Numbers 4:2-49
Take the sum of the sons of Kohath from among the sons of Levi, after their families, according to their fathers' houses,
Treasury of Scripture Knowledge
Summary
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.
The levites
Thirty and eight
General references
Bible References
The levites
Numbers 4:2
Take the sum of the sons of Kohath from among the sons of Levi, after their families, according to their fathers' houses,
Thirty and eight
Numbers 4:48
even those that were numbered of them, were eight thousand five hundred and eighty.
General references
Numbers 4:35
from thirty years old and upward even to fifty years old, every one that entered into the labour, for service in the tent of meeting.