Mahabharata 12.335.85

12.335.85

sāṃkhyānāṃ yogināṃ cāpi yatīnāmātmavedinām |
manīṣitaṃ vijānāti keśavo na tu tasya te || 85 ||

The thoughts of the denizen of all the worlds including Brahma and the high-souled Rishis, of those that are Sankhyas and Yogins, of those that are Yatis, and of those, generally, that are conversant with the Soul are fully known to Kesava, but none of these can know what is thoughts are. Whatever acts are performed in honour of the gods or the Pitris, whatever gifts are made, whatever penances are performed, have Vishnu for their refuge,--who is established upon his own supreme ordinances. He is named Vasudeva because of his being the abode of all creatures. He is immutable. He, is Supreme. He is the foremost of Rishis. He is endued with the highest puissance. He is said to transcend the three attributes. As Time (which runs smoothly without any sign) assumes indications when it manifests itself in the form of successive seasons, even so He, though really divested of attributes (for manifesting Himself). Even they that are high-souled do not succeed in understanding his motions. Only those foremost of Rishis that have knowledge of their Souls, succeed in beholding in their hearts that Purusha who transcends all attributes."