If a man mates with an animal, he shall surely be put to death, and you shall kill the animal.
Leviticus 20:15
Surrounding context
20:14 If a man marries a woman and her mother, it is wickedness. They shall be burned with fire, both he and they, that there may be no wickedness among you.
20:15 If a man mates with an animal, he shall surely be put to death, and you shall kill the animal.
20:16 If a woman approaches any animal and mates with it, you shall kill the woman and the animal. They shall surely be put to death. Their blood is upon them.