And the Levites were purified, and they washed their clothes; and Aaron offered them {as} an offering before the LORD; and Aaron made an atonement for them to cleanse them.

And after that went the Levites in to do their service in the tabernacle of the congregation before Aaron, and before his sons: as the LORD had commanded Moses concerning the Levites, so did they unto them.

This {is it} that {belongeth} unto the Levites: from twenty and five years old and upward they shall go in to wait upon the service of the tabernacle of the congregation: {to...: Heb. to war the warfare of, etc}

And from the age of fifty years they shall cease waiting upon the service {thereof}, and shall serve no more: {cease...: Heb. return from the warfare of the service}