וְאִ֗ישׁ אֲשֶׁ֨ר יִתֵּ֧ן שְׁכָבְתּ֛וֹ בִּבְהֵמָ֖ה מ֣וֹת יוּמָ֑ת וְאֶת־הַבְּהֵמָ֖ה תַּהֲרֹֽגוּ׃
And if a man lie with a beast, he shall surely be put to death; and ye shall slay the beast.
Read kabbalistic (mystical) interpretation of Leviticus 20:15: and classical mystical sources.