Then the LORD spoke to Moses, saying,
Numbers 8:23
Surrounding context
8:22 After that the Levites went in to do their work in the tabernacle of meeting before Aaron and his sons; as the LORD commanded Moses concerning the Levites, so they did to them.
8:23 Then the LORD spoke to Moses, saying,
8:24 "This is what pertains to the Levites: From twenty-five years old and above one may enter to perform service in the work of the tabernacle of meeting;