TantraS, 9, 12.0 taduparāgakṛtaś ca śaktimatsu pramātṛṣu bhedaḥ karaṇabhedasya kartṛbhedaparyavasānāt śakter eva ca avyatiriktāyāḥ karaṇīkartuṃ śakyatvāt na anyasya anavasthādyāpatteḥ //