And the fat of the beast that dieth of itself
Of any disease, and is not regularly killed:
and the fat of that which is torn with beasts;
with wild beasts:
may be used in any other use;
as in medicine, for plasters, or for making candles, or for greasing of anything to make it smooth and pliable, or the like:
but ye shall in no wise eat of it;
such carcasses themselves were not to be eaten of, and one would think their fat in course must be unlawful; but however, to prevent the doing of it, this particular law was given, and those that broke this were doubly guilty, as the Jews observe F13; once in eating things that died of themselves, or were torn with beasts, and again by eating the fat of them.
F13 Maimon. Hilchot Maacolot Asurot, c. 7. sect. 2.