1 Chronicles 23:27

for by the last words of David they took the number of the sons of Levi from a son of twenty years and upward,

1 Chronicles 23:24

These are sons of Levi, by the house of their fathers, heads of the fathers, by their appointments, in the number of names, by their polls, doing the work for the service of the house of Jehovah, from a son of twenty years and upward,

2 Samuel 23:1

And these are the last words of David: -- 'The affirmation of David son of Jesse -- And the affirmation of the man raised up -- Concerning the Anointed of the God of Jacob, And the Sweetness of the Songs of Israel:

1 Chronicles 23:3

and the Levites are numbered from a son of thirty years and upward, and their number, by their polls, is of mighty men thirty and eight thousand.

Psalm 72:20

The prayers of David son of Jesse have been ended.

Treasury of Scripture Knowledge

Summary

For by the last words of David the Levites were numbered from twenty years old and above:

General references

Bible References

By the last

1 Chronicles 23:3
and the Levites are numbered from a son of thirty years and upward, and their number, by their polls, is of mighty men thirty and eight thousand.
2 Samuel 23:1
And these are the last words of David: -- 'The affirmation of David son of Jesse -- And the affirmation of the man raised up -- Concerning the Anointed of the God of Jacob, And the Sweetness of the Songs of Israel:
Psalm 72:20
The prayers of David son of Jesse have been ended.

General references

Numbers 4:35
from a son of thirty years and upward even unto a son of fifty years, every one who is going in to the host, for service in the tent of meeting,