Shiva Purana
अथ भर्तृविहीनाया वक्ष्ये धर्मं सनातनम् ॥ व्रतं दानं तपः शौचं भूशय्यानक्तभोजनम् ॥ २१ ॥
Now I shall explain to you the eternal religious duties of a woman who is bereft of her husband. Vows charity austerities cleanliness lying on the ground and eating at night.
english translation
atha bhartRvihInAyA vakSye dharmaM sanAtanam ॥ vrataM dAnaM tapaH zaucaM bhUzayyAnaktabhojanam ॥ 21 ॥
hk transliteration by Sanscript