Deuteronomy 5:7-9
5:7 You must not have any other gods besides me.
5:8 You must not make for yourself an image of anything in heaven above, on earth below, or in the waters beneath.
5:9 You must not worship or serve them, for I, the Lord your God, am a jealous God. I punish the sons, grandsons, and great-grandsons for the sin of the fathers who reject me,