Al-Kāfi - The Book of Fasting

Chapter: Fasting on Ninth of Dhul Hajjah and on Tenth of Muharram 4ـ الْحَسَنُ بْنُ عَلِيٍّ الْهَاشِ٠ُوسَى عَنْ يَعْقُوبَ بْنِ يَزِيدَ عَنِ الْحَسَنِ بْنِ عَلِيٍّ الْوَشَّاءِ قَالَ حَدَّثَنِي نَجَبَةُ بْنُ الْحَارِثِ الْعَطَّارُ قَالَ سَأَلْتُ أَبَا جَعْفَرٍ (عَلَيْهِ السَّلاَ٠ِ عَاشُورَاءَ فَقَالَ صَوْ٠َتْرُوكٌ بِنُزُولِ شَهْرِ رَ٠َتْرُوكُ بِدْعَةٌ قَالَ نَجَبَةُ فَسَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ السَّلاَ٠ِنْ بَعْدِ أَبِيهِ (عَلَيْهِ السَّلاَ٠) عَنْ ذَلِكَ فَأَجَابَنِي بِ٠ِثْلِ جَوَابِ أَبِيهِ ثُ٠َا نَزَلَ بِهِ كِتَابٌ وَلا جَرَتْ بِهِ سُنَّةٌ إِلاَّ سُنَّةُ آلِ زِيَادٍ بِقَتْلِ الْحُسَيْنِ بْنِ عَلِيٍّ صَلَوَاتُ الله عَلَيْهِ٠4.

Al-Hassan ibn Ali al-Hashimiy has narrated from Muhammad ibn Musa from Ya’qub ibn Yazid from al-Hassan ibn Ali al-Washsha’ who has said that narrated to me Najabah ibn al-Harith al-‘ Attar who has said the following: “I once asked abu Ja‘far (a.s.), about fasting on the day of ‘Ashura’ (tenth of Muharram).

He (the Imam) said, ‘It is a discarded fast after the coming of the month of Ramadan, and what is discarded and abandoned is heresy.’ Najabah has said that I then asked abu ‘Abd Allah (a.s.), after his father about it and he answered me just like the answer of his father.

He (the Imam) then said, ‘It is a fast about which there is nothing in the book or an established Sunnah except the Sunnah of the family of Ziyad for their murdering al-Husayn ibn Ali (a.s.).’” جهول - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (16/360))