Devibhagavatapurana 10.13.42

10.13.42

evaṃ tapasyatastasya śarīrādutthito'nalaḥ |
dadāha jagatīṃ sarvāṃ tadadbhutamivābhavat ||

Thus practising his Tapasyâ a sort of wonderful halo of light emitted from his body and began to burn the whole world. This thing then appeared a great wonder. All the Devas then exclaimed. “Oh! What is this! Oh! What is this!” And they trembled. All were very much terrified and took refuge of Brahmâ. Hearing all the news from the Devas, the four-faced Bhagavân rode on His vehicle, the Swan, and with the Gâyatrî went very gladly to where the Daitya was practising his austerities and saw that the Daitya was immersed in meditation with his eyes closed; and he looked, as it were, blazing with fire, as if a second Fire himself. His belly had become dried up, body withered and the nerves of the bodies, too, became almost visible; only the life breath was lingering there. Brahmâ then spoke to him:-- “O Child! Auspices to you! Now ask the boon that you desire.” Hearing these gladdening nectar-like words from the mouth of Brahmâ, Aruna, the chief of the Daityas opened his eyes and saw Brahmâ in his front. Seeing Brahmâ before him with a rosary of beads and Kâmandalu in his hand and attended by Gâyatrî and the four Vedas, muttering the name of the Eternal Brahmâ, the Daitya rose up and bowed down to Him and sang to Him various Stotras.