You yourselves know how we lived in Egypt and how we passed through the countries on the way here.
You saw among them their detestable images and idols of wood and stone, of silver and gold.
References for Deuteronomy 29:17
Make sure there is no man or woman, clan or tribe among you today whose heart turns away from the LORD our God to go and worship the gods of those nations; make sure there is no root among you that produces such bitter poison.
References for Deuteronomy 29:18