Moses, Aaron, and the leaders of Israel registered all the Levites by their clans and their ancestral houses,
The Levites 30 years old or more were counted; the total number of men was 38,000 by headcount.
They distributed also to those recorded by genealogy of the priests by their ancestral families and the Levites 20 years old and above, by their responsibilities in their divisions;
These were the registered men of the Merarite clans; Moses and Aaron registered them at the Lord’s command through Moses.
from 30 years old to 50 years old, everyone who was qualified to do the work of serving at the tent of meeting and transporting it.