Mbh 14.58.13a

"'The steed said, "Know, O learned Brahmana, that I am the preceptor of thy preceptor, for I am the blazing Jatavedas (deity of fire). By thee I was often worshipped for the sake of thy preceptor, O child of Bhrigu's race, duly and with a pure heart and body. For that reason I shall accomplish what is for thy good. Do my bidding without delay." Thus addressed by the deity of fire, Utanka did as he was directed. The deity then, gratified with him, blazed up for consuming everything. From the pores of his body, O Bharata, in consequence of his very nature, a thick smoke issued threatening terrors to the world of Nagas. With that mighty and wide-spreading smoke, O Bharata, everything became enveloped in gloom, so that nothing, O king, could any longer be seen in the world of the Nagas. Cries of woe were heard throughout the mansions of the Airavatas, uttered by the Nagas headed by Vasuki, O Janamejaya. Enveloped by that smoke, the palaces could no longer be seen, O Bharata. These resembled woods and hill overwhelmed by a thick forest. With eyes that were red in consequence of that smoke, and afflicted by the energy of the deity of fire, the Nagas came out of their mansions to the high-souled son of Bhrigu's race for ascertaining what was the matter. Having heard what the matter was from that ascetic of immeasurable energy, all the Nagas, with fear depicted on their eyes, offered him their worship according to due forms. Indeed, all the Nagas placing the old and the young one's before them, bowed unto him with their heads and joining their hands addressed him, saying, "Be gratified with us, O holy one!" Having gratified that Brahmana and offered him water to wash his feet and the ingredients of the Arghya (for honouring him), the Nagas gave him those celestial and highly-adored ear-rings. Thus honoured by them, Utanka of great prowess, circumambulating the deity of fire, started for the retreat of his preceptor.