From thirty years old and upward until fifty years old shall you number them; all that enter in to perform the service, to do the work in the tabernacle of meeting.
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George Leo Haydock
AD 1849
Thirty. Septuagint, "25 "as ver. 3. (Calmet)
They began to be taught how to act, at 25; but did not officiate till 30. (Du Hamel)