Numbers 3:38-40

Living Bible

³⁸ The area east of the Tabernacle was reserved for the tents of Moses and of Aaron and his sons, who had the final responsibility for the Tabernacle on behalf of the people of Israel. (Anyone who was not a priest or Levite, but came into the Tabernacle, was to be executed.)

³⁹ So all the Levites, as numbered by Moses and Aaron at the command of the Lord, were 22,000 males one month old and older.

⁴⁰ Then the Lord said to Moses, “Now take a census of all the eldest sons in Israel who are one month old and older, and register each name.