Bamidbar 4:18-20

Orthodox Jewish Bible

¹⁸ Cut ye not off the shevet (tribe) of the mishpekhot of the Kehati from among the Levi’im;

¹⁹ But this do unto them, that they may live, and not die, when they approach unto kodesh hakodashim (the most holy things): Aharon and his banim shall go in, and appoint them every one to his avodah (service, ministry) and to his massa (burden);

²⁰ But they shall not go in to look for a single instant at hakodesh, lest they die.