Shiva Purana

siva.sh/siva-purana/saturda-samhita/18/30

अद्यापि ते महारुद्रास्सर्वे शिवस्वरूपकाः ।। देवानां रक्षणार्थाय विराजन्ते सदा दिवि ।। ३० ।।

sanskrit

Even today the great Rudras, identical with Śiva, shine always in the sky for the protection of the gods.

english translation

adyApi te mahArudrAssarve zivasvarUpakAH || devAnAM rakSaNArthAya virAjante sadA divi || 30 ||

hk transliteration by Sanscript