Sahih Bukhari Volume 3, Book 31, Hadith Number 219.Sahih Bukhari Book 31. Fasting Narated By ‘Aisha : Allah’s Apostle ordered (the Muslims) to fast on the day of ‘Ashura’, and when fasting in the month of Ramadan was prescribed, it became optional for one to fast on that day (‘Ashura’) or not. Related Previous Post Sahih Bukhari Volume 3, Book 31, Hadith Number 220. Next Post Sahih Bukhari Volume 3, Book 31, Hadith Number 218.