Shiva Purana

siva.sh/siva-purana/rudra-samhita/162/23

ततः परमसंक्रुद्धो रुद्रो रौद्रवपुर्धरः ।। प्रलयानलवद्धोरो बभूव सहसा प्रभुः ।। २३ ।।

sanskrit

Then the infuriated Śiva assuming a terrible form, became as dreadful as the fire of dissolution, all of a sudden.

english translation

tataH paramasaMkruddho rudro raudravapurdharaH || pralayAnalavaddhoro babhUva sahasA prabhuH || 23 ||

hk transliteration by Sanscript