Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 35
Sanskrit:
मघवन्निदमाख्यातं वर्म नारायणात्मकम् ।विजेष्यसेऽञ्जसा येन दंशितोऽसुरयूथपान् ॥ ३५ ॥
ITRANS:
maghavann idam ākhyātaṁvarma nārāyaṇātmakamvijeṣyase ’ñjasā yenadaṁśito ’sura-yūthapān
Translation:
Viśvarūpa continued: O Indra, this mystic armor related to Lord Nārāyaṇa has been described by me to you. By putting on this protective covering, you will certainly be able to conquer the leaders of the demons.