^17-19 Then the Lord said to Moses and Aaron, “Don’t let the families of Kohath destroy themselves! This is what you must do so that they will not die when they carry the most holy things: Aaron and his sons shall go in with them and point out what each is to carry. ²⁰ Otherwise they must never enter the sanctuary for even a moment, lest they look at the sacred objects there and die.”

^21-23 And the Lord said to Moses, “Take a census of the Gershonite division of the tribe of Levi, all of the men between the ages of thirty and fifty who are eligible for the sacred work of the Tabernacle.