Shiva Purana

siva.sh/siva-purana/saturda-samhita/19/5

य एक ईश्वरः कश्चिदविकारो महाप्रभुः ।। स मे पुत्रवरं दद्यादिति निश्चितमानसः ।। ५ ।।

sanskrit

He decided in his mind thus—, “let that sole great lord, whoever he is, who is free from aberrations, grant me the boon of a son.”

english translation

ya eka IzvaraH kazcidavikAro mahAprabhuH || sa me putravaraM dadyAditi nizcitamAnasaH || 5 ||

hk transliteration by Sanscript