KJ2000(i)
24 This is what pertains to the Levites: from twenty and five years old and upward they shall go in to wait upon the service of the tabernacle of meeting:
25 And from the age of fifty years they shall cease waiting upon the service thereof, and shall serve no more:
26 But shall minister with their brethren in the tabernacle of meeting, to keep the charge, and shall do no service. Thus shall you do unto the Levites regarding their duties.