The 348th prohibition is that we are forbidden from having sexual relations with an animal, whether it be male or female.

The source of this commandment is G‑d's statement,1 "do not perform any sexual act with an animal."

One who transgresses this prohibition intentionally is punished by s'kila; if he does not receive stoning,2 he is punished by kares; and if it was done unintentionally, he must bring a sin-offering.