2 Chronicles 31:16
They made disbursements to all the males three years old and up who were listed in the genealogical records -- to all who would enter the Lord's temple to serve on a daily basis and fulfill their duties as assigned to their divisions.
Ezra 3:4
They observed the Festival of Temporary Shelters as required and offered the proper number of daily burnt offerings according to the requirement for each day.
Leviticus 21:22-23
He may eat both the most holy and the holy food of his God,
1 Chronicles 23:3
The Levites who were thirty years old and up were counted; there were 38,000 men.