Mahabharata 3.299.10

3.299.10

devairapyāpadaḥ prāptāśchannaiśca bahuśastathā |
tatra tatra sapatnānāṃ nigrahārthaṃ mahātmabhiḥ || 10 ||

Men of such stamp are not overwhelmed by any calamity whatever. Even the high-souled gods themselves have wandered over various places in disguise, for the purpose of overcoming foes. Indra for the purpose of overcoming his toes, dwelt in disguise in the asylum of Giriprastha, in Nishadha and thus attained his end. Before taking his birth in the womb of Aditi, Vishnu for the purpose of destroying the Daityas passed a long time unrecognised, assuming the form of the Haya-griba (Horse-necked). Then how disguising himself in the form of a dwarf, he by his prowess deprived Vali of his kingdom, hath been heard by thee! And thou hast also heard how Hutasana entering into water and remaining in concealment, achieved the purpose of the gods. And O thou versed in duty, thou hast heard how Hari with the view of overcoming his foes, entered into Sakra's thunder-bolt, and lay concealed there. And, O sinless one, thou hast heard of the office the regenerate Rishi Aurva at one time performed for the gods, remaining concealed in his mother's womb. And O child, living in concealment in every part of the earth, Vivaswat, endued with excellent energy, at last entirely burnt up all his foes. And living disguised in the abode of Dasaratha, Vishnu of dreadful deeds slew the Ten-necked one in battle.' Thus remaining in disguise in various places, high-souled persons have before this conquered their enemies in battle.