Mbh 12.350.6a

"Vaisampayana continued, 'I have thus narrated to thee, O monarch, the circumstances connected with the former birth of our revered preceptor, viz., Vyasa of unstained mind, as asked by thee. Listen to me once again. There are diverse kinds of cults, O royal sage, that go by diverse names such as Sankhya, Yoga, the Pancha-ratra, Vedas, and Pasupati. The promulgator of Sankhya cult is said to be the great Rishi Kapila. The primeval Hiranyagarbha, and none else, is the promulgator of the Yoga system. The Rishi Apantaratamas is said to be the preceptor of the Vedas, some call that Rishi by the name of Prachina-garbha. The cult known by the name of Pasupata was promulgated by the Lord of Uma, that master of all creatures, viz., the cheerful Siva, otherwise known by the name of Sreekantha, the son of Brahma. The illustrious Narayana is himself the promulgator of the cult, in its entirety, contained in the Pancharatra scriptures. In all these cults, O foremost of kings, it is seen that the puissant Narayana is the one sole object of exposition. According to the scriptures of these cults and the measure of knowledge they contain, Narayana is the one sole object of worship they inculcate. Those persons whose visions, O king, are blinded by darkness, fail to understand that Narayana is the Supreme Soul pervading the entire universe. Those persons of wisdom who are the authors of the scriptures say that Narayana, who is a Rishi, is the one object of reverent worship in the universe. I say that there is no other being like Him. The Supreme Deity, called by the name of Hari, resides in the hearts of those that have succeeded (with the aid of the scriptures and of inference) in dispelling all doubts. Madhava never resides in the hearts of those that are under the sway of doubts and that would dispute away everything with the aid of false dialectics.