Listen for free to MP3 audio of Chapter 4
of the Book of Numbers, KJV

⁴⁶ All those that were numbered of the Levites, whom Moses and Aaron and the chief of Israel numbered, after their families, and after the house of their fathers,
⁴⁷ From thirty years old and upward even unto fifty years old, every one that came to do the service of the ministry, and the service of the burden in the tabernacle of the congregation.
⁴⁸ Even those that were numbered of them, were eight thousand and five hundred and fourscore,