Ramayana
शिशिरे सलिले शायी रात्र्यहानि तपोधनः । एवं वर्षसहस्रं हि तपो घोरमुपागमत् ॥ १-६३-२४
- and in winter, water was his reclining bed even by day or by night. And thus that ascetically wealthy Vishvamitra indeed undertook a severe ascesis in this way, for another thousand years. ॥ 1-63-24॥
english translation
zizire salile zAyI rAtryahAni tapodhanaH । evaM varSasahasraM hi tapo ghoramupAgamat ॥ 1-63-24
hk transliteration by Sanscript