Numbers 4:20-22

New Revised Standard Version Catholic Edition

²⁰ But the Kohathites^[a] must not go in to look on the holy things even for a moment; otherwise they will die.

The Gershonites and Merarites

²¹ Then the Lord spoke to Moses, saying: ²² Take a census of the Gershonites also, by their ancestral houses and by their clans;