Deuteronomy 12:28-30

28Observe and hear all these words which I command thee, that it may go well with thee, and with thy children after thee for ever, when thou doest that which is good and right in the eyes of the LORD thy God.

29When the LORD thy God shall cut off the nations from before thee, whither thou goest in to possess them, and thou possessest them, and dwellest in their land;

30take heed to thyself that thou be not ensnared to follow them, after that they be destroyed from before thee; and that thou inquire not after their gods, saying, How do these nations serve their gods? even so will I do likewise.