2 Chronicles 31:16

without regard to their genealogical enrollment, to the males from thirty years old and upward—everyone who entered the house of the Lord for his daily obligations—for their work in their duties according to their divisions;

Ezra 3:4

They celebrated the Feast of Booths, as it is written, and offered the fixed number of burnt offerings daily, according to the ordinance, as each day required;

Leviticus 21:22-23

He may eat the food of his God, both of the most holy and of the holy,

1 Chronicles 23:3

The Levites were numbered from thirty years old and upward, and their number by census of men was 38,000.

Treasury of Scripture Knowledge

Summary

2 Chronicles 31:16

Beside their genealogy of males, from three years old and upward, even unto every one that entereth into the house of the LORD, his daily portion for their service in their charges according to their courses;

2 Chronicles 31:16