(19) باب صَوْمِ يَوْمِ عَاشُورَاءَ
This hadith has been narrated by Ibn Bishr with the same chain of transmitters (but with a slight variation) that he (the Holy Prophet) inquired of them (Jews) about it (fasting on the day of 'Ashura). (ES)
Reference (ES): Sahih Muslim 1130 b (ES)
In-book reference (ES): Book 13, Hadith 163 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Book 6, Hadith 2519 (ES)