Chapter on Making Up the Month of Ramadan, and the Ruling of One Who Breaks the Fast in It Intentionally and Forgetfully, and One upon Whom Fasting Two Consecutive Months Is Obligatory and He Breaks the Fast during Them, or upon Whom There Is a Vow Regarding Fasting

Tahdhīb al-Aḥkām|Volume 4|Book 2|Chapter 26

Tahdhīb al-Aḥkām

Volume 4, Book 2, Chapter 26

Chapter on Making Up the Month of Ramadan, and the Ruling of One Who Breaks the Fast in It Intentionally and Forgetfully, and One upon Whom Fasting Two Consecutive Months Is Obligatory and He Breaks the Fast during Them, or upon Whom There Is a Vow Regarding Fasting

Hadith #13

وَ عَنْهُ عَنْ مُحَمَّدِ بْنِ اَلْحُسَيْنِ بْنِ أَبِي اَلْخَطَّابِ عَنْ وُهَيْبِ بْنِ حَفْصٍ عَنْ أَبِي بَصِيرٍ قَالَ: قُلْتُ لِأَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ رَجُلٌ صَامَ يَوْماً نَافِلَةً فَأَكَلَ وَ شَرِبَ نَاسِياً قَالَ» يُتِمُّ يَوْمَهُ ذَلِكَ وَلَيْسَ عَلَيْهِ شَيْءٌ«.

And from him, from Muhammad ibn al-Husayn ibn Abi al-Khattab, from Wuhayb ibn Hafs, from Abu Basir, who said: I (narrator) said to Abu Abdillah , peace be upon him: “A man fasted one day as a voluntary fast, then ate and drank forgetfully.” Imam said: “He should complete that day of his, and there is nothing upon him.”

Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 4, p. 349