Shiva Purana
कदाचिन्नारदायाथ शिवरात्रिव्रतन्त्विदम् ॥ भुक्तिमुक्तिप्रदं दिव्यं कथयामास केशवः ॥ ८८ ॥
Once Viṣṇu narrated to Nārada this divine Śivarātrivrata which yields worldly pleasures and salvation.
english translation
kadAcinnAradAyAtha zivarAtrivratantvidam ॥ bhuktimuktipradaM divyaM kathayAmAsa kezavaH ॥ 88 ॥
hk transliteration by Sanscript