Leviticus 18:26-30   26. Ye shall therefore keep my statutes and my judgments, and shall not commit any of these abominations; neither any of your own nation, nor any stranger that sojourneth among you: 27. (For all these abominations have the men of the land done, which were before you, and the land is defiled;) 28. That the land spue not you out also, when ye defile it, as it spued out the nations that were before you. 29. For whosoever shall commit any of these abominations, even the souls that commit them shall be cut off from among their people. 30. Therefore shall ye keep mine ordinance, that ye commit not any one of these abominable customs, which were committed before you, and that ye defile not yourselves therein: I am the LORD your God.

Deuteronomy 12:29-31   29. ¶When the LORD thy God shall cut off the nations from before thee, whither thou goest to possess them, and thou succeedest them, and dwellest in their land; 30. Take heed to thyself that thou be not snared by following them, after that they be destroyed from before thee; and that thou enquire not after their gods, saying, How did these nations serve their gods? even so will I do likewise. 31. Thou shalt not do so unto the LORD thy God: for every abomination to the LORD, which he hateth, have they done unto their gods; for even their sons and their daughters they have burnt in the fire to their gods.