1 Chronicles 23:3
The Levites who were thirty years old and up were counted; there were 38,000 men.
1 Chronicles 23:24
These were the descendants of Levi according to their families, that is, the leaders of families as counted and individually listed who carried out assigned tasks in the Lord's temple and were twenty years old and up.
Numbers 4:2-49
"Take a census of the Kohathites from among the Levites, by their families and by their clans,
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 a census of the Kohathites from among the Levites, by their families and by their clans,
Thirty and eight
Numbers 4:48
those of them numbered were 8,580.
General references
Numbers 4:35
from thirty years old and upward to fifty years old, everyone who entered the company for the work in the tent of meeting;