Numbers 3:37-39

New Century Version

³⁷ They were also responsible for the posts in the courtyard around the Holy Tent and their bases, tent pegs, and ropes.

³⁸ Moses, Aaron, and his sons camped east of the Holy Tent, toward the sunrise, in front of the Meeting Tent. They were responsible for the Holy Place for the Israelites. Anyone else who came near the Holy Place was to be put to death.

³⁹ Moses and Aaron counted the Levite men by their families, as the Lord commanded, and there were 22,000 males one month old or older.