“When you take a census of the men fit for military service, do not include the tribe of Levi.
because the Lord had said to Moses,
As the Lord had commanded Moses, the Levites were not registered with the rest of the Israelites.
The male Levites who were one month old or older numbered 23,000. They were listed separately from the rest of the Israelites, because they were not given any property in Israel.