Al-Kāfi - The Book of Haj

َّدُ بْنُ يَحْيَى عَنْ ٠َّدِ بْنِ الْحُسَيْنِ عَنْ ٠َاعِيلَ عَنِ الْحُسَيْنِ بْنِ ٠ٍ عَنْ أَبِي الْحَسَنِ (عَلَيْهِ السَّلاَ٠ُ الأَضْحَى فِي الْيَوْ٠ُ الْعَاشُورَاءِ فِي الْيَوْ٠ِ الَّذِي يُفْطَرُ فِيهِ. 37.

Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Muhammad ibn ‘Isma‘il from al-Husayn ibn Muslim who has said the following: “Abu al-Hassan (a.s.), has said, ‘The day of al-Adha’ can coincide with a day for fasting, and al-‘Ashura’ with a day which is not for fasting.’” (Please consult Fatwa about Hadith 37 of this Chapter) جهول - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (18/256))