And the Lord spake unto Moses At the same time he gave the instructions about the consecration of the Levites, the time of their entrance on their service, and of leaving it, was fixed: saying; as follows.
21
And the Levites cleanse themselves, and wash their garments, and Aaron waveth them a wave-offering before Jehovah, and Aaron maketh atonement for them to cleanse them,
22
and afterwards have the Levites gone in to do their service in the tent of meeting, before Aaron and before his sons; as Jehovah hath commanded Moses concerning the Levites, so they have done to them.
24
`This [is] that which [is] the Levites': from a son of five and twenty years and upward he doth go in to serve the host in the service of the tent of meeting,
25
and from a son of fifty years he doth return from the host of the service, and doth not serve any more,
Young's Literal Translation is in the public domain.