Numbers 8:23-25

International Standard Version

Age Restrictions for the Descendants of Levi

²³ Later, the Lord told Moses, ²⁴ “Now regarding a descendant of Levi who is 25 years and above, he is to enter work in the service at the appointed place of meeting, ²⁵ but starting at 50 years of age, he is to retire from service and is no longer to work.