1 Chronicles 23:27

for according to the last words of David, the Levites 20 years old or more were to be counted—

1 Chronicles 23:24

These were the sons of Levi by their ancestral houses—the heads of families, according to their registration by name in the headcount—20 years old or more, who worked in the service of the Lord’s temple.

2 Samuel 23:1

These are the last words of David:

The declaration of David son of Jesse,
the declaration of the man raised on high,
the one anointed by the God of Jacob,
the favorite singer of Israel:

1 Chronicles 23:3

The Levites 30 years old or more were counted; the total number of men was 38,000 by headcount.

Psalm 72:20

The prayers of David son of Jesse are concluded.

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
The Levites 30 years old or more were counted; the total number of men was 38,000 by headcount.
2 Samuel 23:1
These are the last words of David:

The declaration of David son of Jesse,
the declaration of the man raised on high,
the one anointed by the God of Jacob,
the favorite singer of Israel:
Psalm 72:20
The prayers of David son of Jesse are concluded.

General references

Numbers 4:35
men from 30 years old to 50 years old, everyone who was qualified for work at the tent of meeting.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.