Shiva Purana
स कदाचिद्वने क्वापि रममाणौ किशोरकौ ॥ अपश्यदन्तकाकारो नवोढौ मुनिदम्पती ॥ १८ ॥
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