Leviticus 20:15

15 “ ‘If a man has sexual relations with an animal, he is to be put to death, and you must kill the animal.

Read Leviticus 20:15 Using Other Translations

And if a man lie with a beast, he shall surely be put to death: and ye shall slay the beast.
If a man lies with an animal, he shall surely be put to death, and you shall kill the animal.
“If a man has sex with an animal, he must be put to death, and the animal must be killed.