Deuteronomy 32:15-18

15But Jeshurun grew fat, and kicked: thou hast become fat, thou art grown thick, thou art covered with fatness ; then he forsook God who made him, and lightly esteemed the Rock of his salvation. 16They provoked him to jealousy with strange gods, with abominations they provoked him to anger. 17They sacrificed to demons, not to God; to gods which they knew not, to new gods that came newly up, whom your fathers feared not.1 18Of the Rock that begat thee thou art unmindful, and hast forgotten God that formed thee.