Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/29/1

सूत उवाच ।। अथातः संप्रवक्ष्यामि नागेशाख्यं परात्मनः ।। ज्योतीरूपं यथा जातं परमं लिंगमुत्तमम् ।। १ ।।

sanskrit

Sūta said:— Hereafter I shall explain how the extremely excellent Jyotirliṅga Nāgeśa of the supreme soul came into being.

english translation

sUta uvAca || athAtaH saMpravakSyAmi nAgezAkhyaM parAtmanaH || jyotIrUpaM yathA jAtaM paramaM liMgamuttamam || 1 ||

hk transliteration by Sanscript