Shiva Purana
एकादश्यां सितायां तु त्याज्यं विष्णो हि भोजनम् ॥ असितायां तु भोक्तव्यं नक्तमभ्यर्च्य मां हरे ॥ १२ ॥
O Viṣṇu, on the eleventh day in the bright lunar fortnight, food during the day is forbidden. O Viṣṇu, on the eleventh day in the dark half food shall be taken at night after my worship.
english translation
ekAdazyAM sitAyAM tu tyAjyaM viSNo hi bhojanam ॥ asitAyAM tu bhoktavyaM naktamabhyarcya mAM hare ॥ 12 ॥
hk transliteration by Sanscript