Numbers 4:30

From thirty years old and upward,.... The Septuagint version here, and in Numbers 4:3, renders it, from twenty five years old and upward, agreeable to Numbers 8:24, at the which age the Levites went into the tabernacle, to wait and to learn their business, but they did not enter upon it till thirty;

even unto fifty years old shalt thou number them; at which age they were discharged from business:

everyone that entereth into the service, to do the work of the tabernacle of the congregation; Numbers 4:3.