24 This is it that belongs to the Levites: from twenty and five years old and upward they shall go in to wait on the service of the tabernacle of the congregation:

25 And from the age of fifty years they shall cease waiting on the service thereof, and shall serve no more:

26 But shall minister with their brothers in the tabernacle of the congregation, to keep the charge, and shall do no service. Thus shall you do to the Levites touching their charge.