Shiva Purana

siva.sh/siva-purana/uma-samhita/15/17

संकर्षणात्मको रुद्रो विषानलशिखोज्ज्वलः ।। कल्पांते निष्क्रमन्ते यद्वक्त्रेभ्योऽग्निशिखा मुहुः ।। दग्ध्वा जगत्त्रयं शान्ता भवंतीत्यनुशुश्रुम ।। १७ ।।

sanskrit

Rudra in the form of Sankarshana is shining with the tip of a poisonous fire At the end of the kalpa flames of fire come out of his mouth again and again We have heard that after burning the three worlds they become peaceful.

english translation

saMkarSaNAtmako rudro viSAnalazikhojjvalaH || kalpAMte niSkramante yadvaktrebhyo'gnizikhA muhuH || dagdhvA jagattrayaM zAntA bhavaMtItyanuzuzruma || 17 ||

hk transliteration by Sanscript