Numbers 4:23

From thirty years old up to fifty years old , you shall list them, all who can come to do duty , to do service in the tent of meeting .

Count all the men from thirty to fifty years of age who come to serve in the work at the tent of meeting.

From thirty years old and upward until fifty years old shalt thou number them; all that enter in to perform the service, to do the work in the tabernacle of the congregation.