Leviticus 20:15 KJV
And if a man lie with a beast, he shall surely be put to death: and ye shall slay the beast.
Leviticus 20:15, King James Version
In context
14 And if a man take a wife and her mother, it is wickedness: they shall be burnt with fire, both he and they; that there be no wickedness among you.
15 And if a man lie with a beast, he shall surely be put to death: and ye shall slay the beast.
16 And if a woman approach unto any beast, and lie down thereto, thou shalt kill the woman, and the beast: they shall surely be put to death; their blood shall be upon them.