Numbers 8:22-24

Amplified Bible, Classic Edition

²² And after that the Levites went in to do their service in the Tent of Meeting with the attendance of Aaron and his sons; as the Lord had commanded Moses concerning the Levites, so did they to them.

²³ And the Lord said to Moses,

²⁴ This is what applies to the Levites: from twenty-five years old and upward they shall go in to perform the work of the service of the Tent of Meeting,