Numbers 4:18-20

Amplified Bible

¹⁸ “Do not cut off (eliminate, destroy) the tribe of the families of the Kohathites [who are only Levites and not priests], from among the Levites [by exposing them to the sin of ^[a]touching the most holy things]. ¹⁹ But deal with them in this way, so that they may live and not die when they approach the most holy things: Aaron and his sons shall go in and assign each of them to his [specific] work and to his load [to be carried on the march]. ²⁰ But the Kohathites shall not go in to see the holy things, even for an instant, or they will die.”