Mbh 13.156.2

"'"'The Rishi said, "How, indeed, shall I protect you?" They answered, saying, "Do thou thyself become Chandramas. Do thou also become the sun, and do thou begin to slay these robbers!" Thus solicited by them, Atri assumed the form of the darkness-destroying Soma. Indeed, in consequence of his agreeable disposition, he began to look as handsome and delightful as Soma himself. Beholding that the real Soma and the real Surya had become darkened by the shafts of the foe, Atri, assuming the forms of those luminaries, began to shine forth in splendour over the field of battle, aided by the puissance of his penances. Verily Atri made the universe blaze forth in light, dispelling all its darkness. By putting forth his puissance, he also subjugated the vast multitudes of those enemies of the deities. Beholding those great Asuras burnt by Atri, the gods also, protected by Atri's energy, began to despatch them quickly. Putting forth his prowess and mastering all his energy, it was even in this way that Atri illumined the god of day, rescued the deities, and slew the Asuras! Even this was the feat that regenerate one, aided by his sacred fire,--that silent reciter of Mantras, that one clad in deer-skins,--accomplished! Behold, O royal sage, that act achieved by that Rishi who subsisted upon fruits only! I have thus narrated to thee, in detail, the feat of the high-souled Atri. Shall I go on? Or, will you say anything? Is there a Kshatriya that is superior to this regenerate Rishi?'