Leviticus 18:24-28

24Make not yourselves unclean in any of these things; for in all these have the nations which I am casting out before you made themselves unclean.

25And the land hath become unclean; and I visit the iniquity thereof upon it, and the land vomiteth out its inhabitants.

26But ye shall observe my statutes and my judgments, and shall not commit any of all these abominations: the home-born, and the stranger that sojourneth among you;

27(for all these abominations have the men of the land done, who were before you, and the land hath been made unclean);

28that the land vomit you not out, when ye make it unclean, as it vomited out the nation that was before you.