1 Chronicles 23:3, 24, 26-27
1 Chronicles 23:3 NASB1995
The Levites were numbered from thirty years old and upward, and their number by census of men was 38,000.
1 Chronicles 23:26-27 NASB1995
Also, the Levites will no longer need to carry the tabernacle and all its utensils for its service.” For by the last words of David the sons of Levi were numbered from twenty years old and upward.