Mbh 12.343.5a

"'The blessed and holy one said, "When Rudra and Narayana became thus engaged in battle, all the universe became suddenly filled with anxiety. The deity of fire ceased to accept libations of even the purest clarified butter duly poured in sacrifices with the aid of Vedic Mantras. The Vedas no longer shone by inward light in the minds of the Rishis of cleansed souls. The attributes of Rajas and Tamas possessed the deities. The Earth trembled. The vault of the firmament seemed to divide in twain. All the luminaries became deprived of their splendour. The Creator, Brahman, himself fell from his seat. The Ocean itself became dry. The mountains of Himavat became riven. When such dire omens appeared everywhere, O son of Pandu, Brahma surrounded by all the deities and the high-souled Rishis, soon arrived at that spot where the battle was raging. The four-faced Brahma, capable of being understood with the aid of only the Niruktas, joined his hands and addressing Rudra, said,--'Let good happen to the three worlds. Throw down thy weapons, O lord of the universe, from desire of benefiting the universe. That which is unmanifest, indestructible, immutable, supreme, the origin of the universe, uniform, and the supreme actor, that which transcends all pairs of opposites, and is inactive, has, choosing to be manifested, been pleased to assume this one blessed form, (for though double, the two but represent the same form). This Nara and Narayana (the displayed forms of Supreme Brahman) have taken birth in the race of Dharma. The foremost of all deities, these two are observers of the highest vows and endued with the severest penances. Through some reason best known to Him, I myself have sprung from the attribute of His Grace. Eternal as thou art, for thou hast ever existed since all the past creations, thou too hast sprung from His Wrath.