Komentarz do Kapłańska 11:43

אל תשקצו YE SHALL NOT MAKE [YOUR SOULS] ABOMINABLE, by eating these (Meilah 16b): this must be the meaning, because you see it is written “[ye shall not make] your souls [abominable]” and no soiling of the soul arises from touching these creatures. And similarly the words (v. 44) “neither shall ye defile [your souls]” mean: by eating them.

ולא תטמאו בהם כי אני ה' אלוקיכם והתקדשתם, do not contaminate yourselves in a manner that will make this contamination really serious, i.e. by eating these creatures or parts of them. Seeing that I am your G’d I desire you to sanctify yourselves so that you will be in a state capable of absorbing holiness on an ongoing basis.

בכל השרץ השורץ, “through any of the teeming creatures which teem.” Significantly, the words “on earth,” are absent in this verse. If the Torah had added these words (as previously) we would have thought that the warning not to allow these abhorrent things to contaminate us was limited to the creatures moving about on the earth. We are aware already that the creature known as עכבר, exists both on land and in the sea (compare Chulin 126). When seen on land we know it as “a mouse.” The same applies to some of the species which we are not familiar with. By omitting mention of “on land,” the Torah ensures that we know that all the creatures bearing the names mentioned here, be they land-based or water-based, fall under the same prohibition. He who eats them makes himself an abomination and defiles himself ritually.