Shiva Purana

siva.sh/siva-purana/saturda-samhita/6/38

ततः क्षणादहं शंभोस्तनुजस्तस्य चाज्ञया।। स जातः पूर्व्वमेवाहं युगान्ताग्निसमप्रभः ।। ३८ ।।

sanskrit

But before the beginning of sacrifice I was born as Śiva’s son at his bidding, with a lustre as brilliant as the fire at the end of a Yuga.

english translation

tataH kSaNAdahaM zaMbhostanujastasya cAjJayA|| sa jAtaH pUrvvamevAhaM yugAntAgnisamaprabhaH || 38 ||

hk transliteration by Sanscript