Chapter on Additions
Tahdhīb al-Aḥkām|Volume 4|Book 2|Chapter 33
مُحَمَّدٌ عَنْ مُحَمَّدِ بْنِ عِيسَى عَنِ اَلْحُسَيْنِ بْنِ عُبَيْدٍ قَالَ: كَتَبْتُ إِلَيْهِ يَعْنِي أَبَا اَلْحَسَنِ اَلثَّالِثَ عَلَيْهِ اَلسَّلاَمُ يَا سَيِّدِي رَجُلٌ نَذَرَ أَنْ يَصُومَ يَوْماً لِلَّهِ فَوَقَعَ فِي ذَلِكَ اَلْيَوْمِ عَلَى أَهْلِهِ مَا عَلَيْهِ مِنَ اَلْكَفَّارَةِ فَأَجَابَهُ عَلَيْهِ اَلسَّلاَمُ» يَصُومُ يَوْماً بَدَلَ يَوْمٍ وَتَحْرِيرُ رَقَبَةٍ«.
Muhammad, from Muhammad ibn Isa, from al-Husayn ibn Ubayd, who said:
I (narrator) wrote to Imam عليه السلام, meaning Abu al-Hasan al-Thalith عليه السلام (the Third), peace be upon him: “O my master, a man vowed to fast a day for Allah سبحانه وتعالى, then on that day he had intercourse with his wife; what expiation is upon him?” So the Imam عليه السلام, peace be upon him, answered him: “He fasts one day in place of a day, and the freeing of a slave.”
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 4, p. 412
- Ṣaḥīḥ al-Tahdhīb