Punishment: Death Penalty for Bestiality
Source: Nav
Exodus 22:19
Whoever lies with an animal must surely be put to death.
Leviticus 20:15, 16
If a man lies carnally with an animal, he must be put to death. And you are also to kill the animal. / If a woman approaches any animal to mate with it, you must kill both the woman and the animal. They must surely be put to death; their blood is upon them.