Hadith #2422The Book of Fasting · Narrated by Abu Dharr al-Ghaffari, al-Fadl bin Musa al-Synany الفضل بن موسى السيناني, Muhammad bin 'Abdul 'Aziz bin al-Wasti محمد بن عبد العزيز العمري الرملي بن الوا, Musa ibn Talha, Yahya bin Sam يحيى بن سام
the Messenger of Allah used to fast nine days of Dhul-Hijjah, the day of ‘Ashura’, and three days of each month: The first Monday of the month, and two Thursday.
Hadith #2423The Book of Fasting · Narrated by Abdur Rahman bin Mahdi عبد الرحمن بن مهدي, Abu Dharr al-Ghaffari, Musa ibn Talha, Shu'bah bin al-Hajjaj شعبة بن الحجاج, Sulaiman al-A'mash الأعمش / سليمان بن مهران, Yahya bin Sam يحيى بن سام
“The Prophet used to fast the ten (days), and three days of each month: Monday and Thursday.”
Hadith #2424The Book of Fasting · Narrated by Abdur Rahman bin Mahdi عبد الرحمن بن مهدي, Musa ibn Talha, Shu'bah bin al-Hajjaj شعبة بن الحجاج, Sulaiman al-A'mash الأعمش / سليمان بن مهران, Yahya bin Sam يحيى بن سام
“The Messenger of Allah used to enjoin fasting three days: The first Thursday, and Monday and Monday.”
Hadith #761The Book on Fasting · Narrated by Abu Da'ud أبو داود السجستاني الأزدي, Abu Dharr al-Ghaffari, Mahmud bin Ghaylan محمود بن غيلان العدوي مولاهم أبو أحمد, Musa ibn Talha, Shu'bah bin al-Hajjaj شعبة بن الحجاج, Sulaiman al-A'mash الأعمش / سليمان بن مهران, Yahya bin Sam يحيى بن سام
the Messenger of Allah said: “O Abu Dharr! When you fast three days out of a month, then fast the thirteenth, fourteenth, and fifteenth.”