Rashi on Deuteronomy 14:6/רש"י על דברים י״ד:ו׳

1מפרסת means split, as the Targum has it.

2פרסה - plante in O. F. (English = hoof).

3ושסעת AND HATH CLOVEN [HOOFS] — i.e. hoofs divided into two nails, for there are animals with hoofs split but not entirely divided into two nails (cf. Rashi on Leviticus 9:3), and such are unclean.

4בבהמה [AND EVERY BEAST THAT PARTETH THE HOOF …] AMONG THE BEASTS [YE MAY EAT] — if one takes בבהמה to signify “within the animal”, it suggests: that which is found in the beast you may eat. From here, therefore, they (the Rabbis) derived the law that a שליל (a fully developed embryo) becomes permitted to be eaten through the slaughter of its mother without requiring ritual slaughtering itself (Chullin 69a; Chullin 74a).