Numbers 4:19
but do this to them, that they may live, and not die, when they approach the most holy things: Aaron and his sons shall go in and appoint everyone to his service and to his burden;
World English Bible (Public Domain)
In context
Before · Numbers 4:17–18
17The LORD spoke to Moses and to Aaron, saying, 18“Don’t cut off the tribe of the families of the Kohathites from among the Levites;
19but do this to them, that they may live, and not die, when they approach the most holy things: Aaron and his sons shall go in and appoint everyone to his service and to his burden;