Komentaryo sa Exodo 22:18: Rashi & Chizkuni

כל שכב עם בהמה מות יומת — All who have carnal connection with beasts, whether men or women, shall surely be put to death — by stoning, for it states of such, (Leviticus 20:16) “their blood is upon them” (cf. Rashi on Exodus 21:17) (Mekhilta)].

כל שוכב עם בהמה מות יומת, “anyone indulging in carnal relations with an animal must be executed legally.”After dealing with a minor girl who had been too young to understand what she had been guilty of, the Torah turns to animals which have no mouth with which to protest being raped.

מות יומת, that person will be executed by stoning. In Leviticus 20,16 the Torah elaborates further by decreeing that both parties involved in such an activity will be killed. The Torah there spells out that both the human being and the animal are perceived as having forfeited their lives, i.e. דמיהם בם.