Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 39
Sanskrit:
तत् सूर्यकोटिप्रतिमं सुदर्शनंजाज्वल्यमानं प्रलयानलप्रभम् ।स्वतेजसा खं ककुभोऽथ रोदसीचक्रं मुकुन्दास्त्रमथाग्निमार्दयत् ॥ ३९ ॥
ITRANS:
tat sūrya-koṭi-pratimaṁ sudarśanaṁjājvalyamānaṁ pralayānala-prabhamsva-tejasā khaṁ kakubho ’tha rodasīcakraṁ mukundāstraṁ athāgnim ārdayat
Translation:
That Sudarśana, the disc weapon of Lord Mukunda, blazed forth like millions of suns. His effulgence blazed like the fire of universal annihilation, and with his heat he pained the sky, all the directions, heaven and earth, and also the fiery demon.