Midrash su Levitico 18:23

2) We have learned the punishment for the active participant. Whence do we derive the punishment for the passive participant? From (Shemoth 28:18) "Whoever lies with a beast shall be put to death." If it is not needed for the active participant, learn it as applying to the passive one. We have learned the punishment both for the active participant and for the passive one. Whence is derived the exhortation? From (Vayikra 18:23) "And with every beast do not give your lying to become unclean with it." We have learned the exhortation for the active participant. Whence do we learn that for the passive participant? From (Devarim 23:18) "There shall not be a harlot from the sons of Israel," and (I Kings 14:24) "And there was also a harlot in the land; they did as all the abominations of the nations, etc." These are the words of R. Yishmael. R. Akiva says: This is not needed; it is written "Do not give shechavtecha" ("your lying"), which can also be read as "Do not give shechivatecha" ("your being lain with.")

4) We have heard the punishment, but not the exhortation; it is, therefore, written (Vayikra 18:23) "And a woman shall not stand before a beast to mount her; it is perverse."

(Exodus 22:18) "Whoever lies with a beast shall be put to death": What is the intent of this? It is written (Leviticus 20:15) "And a man who cohabits with a beast shall be put to death" — by stoning. You say by stoning, but perhaps, by one of the other death penalties in Scripture? It is, therefore, written (Ibid.) "and the beast shall you kill." It is written here "kill," and elsewhere (Devarim 13:10) "kill." Just as there, stoning (is indicated), so, here, stoning. We have heard the penalty. Whence is the exhortation (derived)? From (Leviticus 18:23) "And you shall not cohabit with any beast." This tells me only of the punishment and the exhortation for the active agent. Whence do we derive the punishment for the passive agent? From (our verse) "Whoever lies with a beast shall be put to death." Scripture (hereby) equated the passive agent with the active one. Just as the second is to be stoned, so, the first. We have heard the punishment. Whence the exhortation (for the passive agent)? It is, therefore, written (Devarim 23:18) "and there shall not be a (male) harlot among the children of Israel," and (I Kings 14:24) "And there was also a (male) harlot in the land. They did according to all the abominations of the nations which the L rd drove out."