Parashas Acharei Mos · Passuk 18:23
Chabad.org — English translation + Rashi
Torah Temima points to Sanhedrin 54b.
English: “Do not give your lying” — warning to one who lies with a beast; R. Akiva reads it also as warning one who is lain with by a beast.
Active and passive with a beast
Both the one who initiates and the one who receives bestial relations are forbidden under the verse.