Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/10/18

स कदाचिद्वने क्वापि रममाणौ किशोरकौ ।। अपश्यदन्तकाकारो नवोढौ मुनिदम्पती ।। १८ ।।

sanskrit

Once, somewhere in the forest, the king who was as hideous as the god of death saw a newly married couple—a young sage and his young wife indulging in sexual dalliance.

english translation

sa kadAcidvane kvApi ramamANau kizorakau || apazyadantakAkAro navoDhau munidampatI || 18 ||

hk transliteration by Sanscript