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 #23

فَأَمَّا مَا رَوَاهُ عَلِيُّ بْنُ اَلْحَسَنِ بْنِ فَضَّالٍ عَنْ هَارُونَ بْنِ مُسْلِمٍ وَ سَعْدَانَ عَنْ مَسْعَدَةَ بْنِ صَدَقَةَ عَنْ أَبِي عَبْدِ اَللَّهِ عَنْ أَبِيهِ عَلَيْهِمَا اَلسَّلاَمُ أَنَّ عَلِيّاً عَلَيْهِ اَلسَّلاَمُ قَالَ:» اَلصَّائِمُ تَطَوُّعاً بِالْخِيَارِ مَا بَيْنَهُ وَبَيْنَ نِصْفِ اَلنَّهَارِ فَإِذَا اِنْتَصَفَ اَلنَّهَارُ فَقَدْ وَجَبَ اَلصَّوْمُ«.

As for what Ali ibn al-Hasan ibn Faddal narrated, from Harun ibn Muslim and Sadan, from Masadah ibn Sadaqah, from Abu Abdillah Imam Ja’far from his father, Imam al-Baqir , peace be upon them both: Imams said: “Imam Ali , peace be upon him, said: ‘The one fasting voluntarily has the choice between himself and midday. Then when the day reaches its middle, the fast has become obligatory.’”

Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 4, p. 352