Leviticus 18:28-30

²⁸That the land may not vomit you out also, when ye defile it, as it vomited out the nations that were before you.

²⁹For whoever shall commit any of these abominations, even the souls that commit them shall be cut off from among their people.

³⁰Therefore shall ye keep my ordinance, that ye commit not any one of these abominable customs, which were committed before you, and that ye defile not yourselves in them; I am the LORD your God.