Deuteronomy 32:15-18

15But Jeshurun waxed fat, and kicked: thou art waxen fat, thou art grown thick, thou art covered with fatness; then he forsook God which made him, and lightly esteemed the Rock of his salvation. 16They provoked him to jealousy with strange gods, with abominations provoked they him to anger. 17They sacrificed unto devils, not to God; to gods whom 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.