Numbers 8:22-24

International Standard Version

²² After this, the descendants of Levi entered into their work of service at the appointed place, in the presence of Aaron and his sons. They did everything that the Lord commanded Moses concerning the descendants of Levi.

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,