Mbh 13.14.2a

"'Bhishma said, "I am quite incompetent to recite the virtues of Mahadeva of highest intelligence. He pervades all things in the universe and yet is not seen anywhere. He is the creator of universal self and the Pragna (knowing) self and he is their master. All the deities, from Brahman to the Pisachas, adore and worship him. He transcends both Prakriti and Purusha. It is of Him that Rishis, conversant with Yoga and possessing a knowledge of the tattwas, think and reflect. He is indestructible and Supreme Brahman. He is both existent and non-existent. Agitating both Prakriti and Purusha by means of His energy, He created therefrom the universal lord of creatures, viz., Brahma. Who is there that is competent to tell the virtues of that god of gods, that is endued with supreme Intelligence? Man is subject to conception (in the mother's womb), birth, decrepitude, and death. Being such, what man like me is competent to understand Bhava? Only Narayana, O son, that bearer of the discus and the mace, can comprehend Mahadeva. He is without deterioration. He is the foremost of all beings in attributes. He is Vishnu, because of his pervading the universe. He is irresistible. Endued with spiritual vision, He is possessed of supreme Energy. He sees all things with the eye of Yoga. It is in consequence of the devotion of the high-souled Krishna to the illustrious Rudra whom he gratified, O Bharata, in the retreat of Vadari, by penances, that he has succeeded in pervading the entire universe. O king of kings, it is through Maheswara of celestial vision that Vasudeva has obtained the attribute of universal agreeableness,--an agreeableness that is much greater than what is possessed by all articles included under the name of wealth.[32] For a full thousand years this Madhava underwent the austerest penances and at last succeeded in gratifying the illustrious and boon giving Siva, that Master of all the mobile and the immobile universe.