Numbers 8:22-24

Douay-Rheims 1899 American Edition

²² That being purified they might go into the tabernacle of the covenant to do their services before Aaron and his sons. As the Lord had commanded Moses touching the Levites, so was it done.

²³ And the Lord spoke to Moses, saying:

²⁴ This is the law of the Levites: From twenty-five years old and upwards, they shall go in to minister in the tabernacle of the covenant.