2. We were told by Muhammed bin Hasan bin Ahmad bin Waleed, may Allah be pleased with him, that he said: We were told by Muhammed bin Hasan al-Saffar, that he said: We were told by Ahmad bin Muhammed bin Isa, from Musa bin Qasem al-Bajali, from Ali bin Abi Hamza, from Abu Baseer, from Abu Abdillah, peace be upon him, with regards to the saying of Allah, Exalted and Glorious is He: «Repent to Allah a sincere repentance» (66:8). He said:

It is the fasting of the day of Wednesday, the day of Thursday and the day of Friday.