1 Chronicles 23:3, 24, 26, 27
1 Chronicles 23:3 NIV
The Levites thirty years old or more were counted, and the total number of men was thirty-eight thousand.
1 Chronicles 23:26 NIV
the Levites no longer need to carry the tabernacle or any of the articles used in its service.”
1 Chronicles 23:27 NIV
According to the last instructions of David, the Levites were counted from those twenty years old or more.