and from the age of fifty years they shall retire from the duty of the service and serve no more.
from thirty years old up to fifty years old you shall enroll them, all who qualify to do work in the tent of meeting.
“This applies to the Levites: from twenty-five years old and up they shall begin to do duty in the service of the tent of meeting;
They may assist their brothers in the tent of meeting in carrying out their duties, but they shall perform no service. Thus you shall do with the Levites in assigning their duties.”
I have fought the good fight; I have finished the race; I have kept the faith.