Leviticus 18 is a chapter of the Biblical book of Leviticus. According to the Hebrew Bible, it narrates part of the instructions given to Moses by God on Mount Sinai. The chapter deals with a number of sexual activities considered 'unclean' or 'abominable'. Although the chapter is principally concerned with incest, it also contains laws related to #$%$ and "lying with a man as with a woman." This single reference in verse 22 has, in recent years, made the interpretation of this verse a focus of debate among Christians and Jews regarding homosexual activity (see Homosexuality and Christianity and Jewish views of homosexuality).
Leviticus 18 is generally regarded as part of the holiness code of Leviticus 11–26, and its sexual prohibitions are largely paralleled by Leviticus 20 (except that chapter has more emphasis on punishment).