Mahabharata 3.170.37

3.170.37

taiḥ pīḍyamāno bahubhiḥ kṛtāstraiḥ kuśalairyudhi |
vyathito'smi mahāyuddhe bhayaṃ cāgānmahanmama || 37 ||

At this, thousands of weapons (shot) by those wonderfully warring charioteers, by degrees opposed my unearthly arms and in the field I saw hundreds and thousands of mighty (demons) ranging on their cars, in various manoeuvres. And being furnished with variegated mail and standards and diverse ornaments, they delighted my mind. And in the conflict I could not afflict them by showers of shafts, but they did not afflict me. And being afflicted by those innumerable ones, equipped in weapons and skilled in fight, I was pained in that mighty encounter and a terrible fear seized me. Thereupon collecting (my energies) in fight, I (bowed down) unto that god of gods, Raudra, and saying, 'May welfare attend on all beings!' I fixed that mighty weapon which, celebrated under the name of Raudra, is the destroyer of all foes. Then I beheld a male person having three heads, nine eyes, three faces, and six arms. And his hair was flaming like fire or the sun. And, O slayer of foes, for his dress, he had mighty serpents, putting out their tongues. And saying, O best of the Bharatas, the dreadful and eternal Raudra, I being free from fear, set it on the Gandiva; and, bowing unto the three-eyed Sarva of immeasurable energy, let go (the weapon), with the object of vanquishing those foremost of the Danavas, O Bharata.