What does Numbers 4:19 mean?

but thus do unto them, that they may live, and not die, when they approach unto the most holy things: Aaron and his sons shall go in, and appoint them every one to his service and to his burden;

But thus do unto them, that they may live, and not die, when they approach unto the most holy things: Aaron and his sons shall go in, and appoint them every one to his service and to his burden:

but thus do unto them, that they may live, and not die, when they approach unto the most holy things: Aaron and his sons shall go in, and appoint them every one to his service and to his burden;

But do this to them, so that life and not death may be theirs when they come near the most holy things; let Aaron and his sons go in and give to every one his work and that which he is to take up;

but this do to them, and they have lived, and do not die in their drawing nigh the holy of holies: --Aaron and his sons go in, and have set them, each man to his service, and unto his burden,

But do this to them, that they may live, and not die, by touching the holies of holies. Aaron and his sons shall go in, and they shall appoint every man his work, and shall divide the burdens that every man is to carry.

but this shall ye do unto them, that they may live, and not die, when they draw near unto the most holy things: Aaron and his sons shall go in, and appoint them every one to his service and to his burden;