1 Chronicles 23:27

For by the last words of David the sons of Levi were numbered, from twenty years old and upward.

1 Chronicles 23:24

These were the sons of Levi after their fathers houses, even the heads of the fathers houses of those of them that were counted, in the number of names by their polls, who did the work for the service of the house of Jehovah, from twenty years old and upward.

2 Samuel 23:1

Now these are the last words of David. David the son of Jesse saith, And the man who was raised on high saith, The anointed of the God of Jacob, And the sweet psalmist of Israel:

1 Chronicles 23:3

And the Levites were numbered from thirty years old and upward: and their number by their polls, man by man, was thirty and eight thousand.

Psalm 72:20

The prayers of David the son of Jesse are 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 were numbered from thirty years old and upward: and their number by their polls, man by man, was thirty and eight thousand.
2 Samuel 23:1
Now these are the last words of David. David the son of Jesse saith, And the man who was raised on high saith, The anointed of the God of Jacob, And the sweet psalmist of Israel:
Psalm 72:20
The prayers of David the son of Jesse are ended.

General references

Numbers 4:35
from thirty years old and upward even unto fifty years old, every one that entered upon the service, for work in the tent of meeting:

American Standard Version Public Domain