Leviticus 18:28-30

28That the land may not spue you out also, when ye defile it, as it spued 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.