Mbh 5.49.1

Vaisampayana said, “In the midst, O Bharata, of all those assembled kings, Bhishma, the son of Santanu, then said these words unto Duryodhana, ‘Once on a time, Vrihaspati and Sakra went to Brahma. The Maruts also with Indra, the Vasus with Agni, the Adityas, the Sadhyas, the seven celestial Rishis, the Gandharvas, Viswavasu, and the beautiful tribes of the Apsaras, all approached the ancient Grandsire. And having bowed down unto the Lord of the universe, all those dwellers of heaven sat around him. Just then, the two ancient deities, the Rishis Nara and Narayana, as if drawing unto themselves by their own energy the minds and energies of all who were present there, left the place. Thereupon, Vrihaspati asked Brahma, saying,--“Who are these two that leave the place without worshipping thee? Tell us, O Grandsire, who are they?” Thus asked, Brahma said, “These two, endued with ascetic merit, blazing with effulgence and beauty, illuminating both the earth and the heaven, possessed of great might, and pervading and surpassing all, are Nara and Narayana, dwelling now in the region of Brahman having arrived from the other world. Endued with great might and prowess, they shine in consequence of their own asceticism. By their acts they always contribute to the joy of the world. Worshipped by the gods and the Gandharvas, they exist only for the destruction of Asuras.”’