Mahabharata Anushasna Parva Chapter 147:4

Mahabharata Anushasna Parva (Dana Dharma Parva) Chapter 147:4 The son of Devaki should be seen by them with reverence and in order to see Him with reverence they should address themselves to the performance of penances. Ye foremost of ascetics, even this is the path that I show unto you. By beholding Him, ye will have behold all the foremost of deities. I too bow my head in reverence unto that Lord of the universe, that Grandsire of all the worlds, that mighty and vast boar. By beholding Him one beholds the Trinity. Ourselves, i.e., all the deities, reside in Him. He will have an elder brother who will become known over all the world as Vala. Having a plough for his weapon, in form he will look like a white hill. In fact, he will be endued with might capable of uplifting the whole earth. Upon the car of that divine person a tall palmyra, three-headed and made of gold, will form his proud standard. The head of that mighty-armed hero, that Lord of all the worlds, will be shaded by many high-souled snakes of vast bodies. All weapons of attack and defence will also come to him as soon as he will think of them. He is called Ananta (Infinite). Verily, that illustrious one is identical with the immutable Hari. Once on a time the mighty Garuda, the son of Kasyapa, was addressed by the deities in these words, 'Do thou, O puissant one, see if this one has any end!' Though possessed of great energy and might, Garuda, however, failed to find out the end of this illustrious one who is identical with the Supreme Soul. Supporting the whole earth on his head, he resides in the nether regions. He roves through the universe as Sesha, filled with great joy. He is Vishnu. He is the illustrious Ananta. He is the supporter of the earth. He that is Rama is Hrishikesa. He that is Achyuta is Ananta, the bearer of the earth. Both of those foremost of all creatures are celestial and endued with celestial prowess. One of them is armed with the discus and the other with the plough. They deserve every honour and should be seen. I have, through my kindness for you, have thus declared to you the nature of Vasudeva. Even this, ye ascetics possessed of wealth of penances, is Righteousness. I have declared all this to you so that ye may, with reverence and care, worship Krishna, that foremost one of Yadu's race.'"