Numbers 8:22-24

Holman Christian Standard Bible

²² After that, the Levites came to do their work at the tent of meeting in the presence of Aaron and his sons. So they did to them as the Lord had commanded Moses concerning the Levites.

²³ The Lord spoke to Moses: ²⁴ “In regard to the Levites: From 25 years old or more, a man enters the service in the work at the tent of meeting.^(A)