Deuteronomy 29:18

29:18 Lest there should be among you man, or woman, or family, or tribe, whose heart turneth away this day from the LORD our God, to go [and] serve the gods of these nations; lest there should be among you a root that beareth gall and wormwood;

Deuteronomy 31:21

31:21 And it shall come to pass, when many evils and troubles are befallen them, that this song shall testify against them as a witness; for it shall not be forgotten out of the mouths of their seed: for I know their imagination which they go about, even now, before I have brought them into the land which I sware.