Rashi on Numbers
אל תכריתו CUT YE NOT OFF [THE TRIBE OF THE FAMILIES OF THE KOHATHITES] — Do not bring it about for them that they shall die.
Sforno on Numbers
אל תכריתו, do not allow the procedure of carrying parts of the Tabernacle to be a free for all, the one first on the spot carrying the part he chooses to, for if you do this the resulting chaos will lead to destruction, to death. Such chaotic conditions will inevitably lead to desecration of holy things, holy objects, with tragic results, i.e. loss of life. Our sages illustrated what is meant when describing the race between priests to be the first to carry out the cleaning of the ashes off the top of the altar. (compare Yuma 23-24).