cease waiting upon the service thereof. Heb. return from the warfare of the service

Numbers 4:23 From thirty years old and upward until fifty years old shall you number them; all that enter in to perform the service...

2 Timothy 4:7 I have fought a good fight, I have finished my course, I have kept the faith:

the Levites, above fifty years of age, might superintend and assist their junior brethren in the ordinary offices, and give them and the people counsel and instruction; but they were exempted from carrying the tabernacle and from other laborious services. It is remarkable, that no law was made concerning the age at which the priests should begin to officiate, and though various blemishes disqualified them for the service of the sanctuary, yet they continued their ministrations till death, if capable. On the other hand, nothing is said concerning any bodily defects or blemishes disqualifying the Levites; but the time of their service is expressly settled. Their work was far more laborious than that of the Priests; it is therefore likely that the priests would not begin very early to officiate; and the wisdom and experience of age would increase, rather than diminish, their fitness for the sacred duties of their office.