Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/9/35

श्रीगोकर्णे शिवतिथावुपोष्य शिवमस्तके ।। कृत्वा जागरणं सा हि चक्रे बिल्वार्चनं निशि ।। ३५ ।।

sanskrit

At Gokarṇa on Śiva’s Tithi during the night she had kept awake and observed fast. She had performed the worship of Śiva’s image with Bilva bunch.

english translation

zrIgokarNe zivatithAvupoSya zivamastake || kRtvA jAgaraNaM sA hi cakre bilvArcanaM nizi || 35 ||

hk transliteration by Sanscript