After the revelation of the Qur’anic verse enacting the fast of Ramadan, it remained mustahabb, but lost the recommendation and emphasis it enjoyed before. The second opinion of Shafi‘i’s companions is similar to that of Abu Hanifah.
‘Ayad has said that some predecessors used to believe that this fast was wajib and remained wajib without any abrogation even after the verse enacting the fast of Ramadan, but supporters of this opinion have been weakened and vanquished and hence common consensus is that this fast is not wajib, and they maintain that it is mustahabb.”4
2. Ibn Qudamah says, “There are differing opinions about the fast of the day of ‘Ashura as to whether it was wajib or not. Qadi says that it was wajib and this is as a result of religious deduction and conclusion. He has deduced this using two rationales. It has also been quoted from Ahmad ibn Hanbal that the fast of the day of ‘Ashura was wajib.”5
3. Kasani writes, “The fast of the day of ‘Ashura was wajib during those days.”6
4. ‘Asqalani says, “It can be deduced from the total sum of reported hadiths that this fast was wajib.” After this, he has listed six reasons to support and prove his claim.7
4. ‘Umdah al-Qari, vol. 11, p. 118.
5. Al-Mughni, vol. 3, p. 174.
6. Bada’i‘ al-Sana’i‘, vol. 2, p. 262.
7. Fath al-Bari, vol. 4, p. 290.