Mbh 13.16.1b

--After he had said these words, Tandi beheld before him that ocean of penances, that great Deity who is immutable and undeteriorating, who is without compare, who is inconceivable, who is eternal, and who is without any change, who is indivisible, who is whole, who is Brahma, who transcends all attributes, and who is endued with attributes, who is the highest delight of Yogins, who is without deterioration, who is called Emancipation, who is the refuge of the Mind, of Indra, of Agni, of the god of wind, of the entire universe, and of the Grandsire Brahma; who is incapable of being conceived by the Mind, who is without mutation of any kind, who is pure, who is capable of being apprehended by understanding only and who is immaterial as the Mind; who is difficult of comprehension, who is incapable of being measured, who is difficult of being attained by persons of uncleansed souls, who is the origin of the universe, and who transcends both the universe and the attribute of darkness; who is ancient, who is Purusha, who is possessed of effulgence, and who is higher than the highest. The Rishi Tandi, desirous of beholding Him who making himself endued with life-breaths, resides in what results from it viz., Jiva, in the form of that effulgence which is called the Mind, passed many years in the practice of the severest austerities, and having succeeded in beholding Him as the reward of those penances, he praised the great God in the following terms.