Leviticus 15:32

15:32 This is the law of the one with a discharge: the one who has a seminal emission and becomes unclean by it,

Leviticus 18:20

18:20 You must not have sexual intercourse with the wife of your fellow citizen to become unclean with her.

Leviticus 26:32

26:32 I myself will make the land desolate and your enemies who live in it will be appalled.