Leviticus 18:23

18:23 You must not have sexual intercourse with any animal to become defiled with it, and a woman must not stand before an animal to have sexual intercourse with it; it is a perversion.

Leviticus 20:3

20:3 I myself will set my face against that man and cut him off from the midst of his people, because he has given some of his children to Molech and thereby defiled my sanctuary and profaned my holy name.