1 Chronicles 23:3

The Levites thirty years old or older were counted, and the total number of men was thirty-eight thousand.

1 Chronicles 23:24

These were the descendants of Levi by their families, the heads of families as they were registered under their names and counted individually, that is, the workers twenty years old or more who served in the Temple of Jehovah.

Numbers 4:2-49

Take a census of the Levites who are descended from Kohath. List them by families and households.

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 Levites who are descended from Kohath. List them by families and households.

Thirty and eight

Numbers 4:48
They counted eight thousand five hundred and fifty.

General references

Numbers 4:35
They registered all the men between the ages of thirty and fifty who were qualified to work at the tent of meeting.