The Book of Fasting
كتاب الصيام
Chapter 84: Mentioning The Differences Reported From Musa Bin Talhah In The Narration About Fasting three days of each month
"A rabbit that a man had grilled was brought to the Prophet and when he offered it to him he said: 'O Messenger of Allah, I saw some blood on it." The Messenger of Allah did not eat it, but he said to those who were with him: "Eat; if I felt like it, I would have eaten it.' There was a man sitting, and the Messenger of Allah said: 'Come and eat with the people.' He said: 'O Messenger of Allah, I am fasting.' He said: 'Why don't you fast Al-Bid?' He said: 'What are they?' He said: "The thirteenth, fourteenth and fifteenth?"'
the Messenger of Allah used to enjoin (fasting) these days of Al-Bid and he said: "That is (equivalent to) fasting for the whole month."
the Prophet commanded them to fast the three days of Al-Bid. He said: "That is (equivalent to) fasting for the whole month."
"The Messenger of Allah used to command us to fast the three days with the shining bright nights (Al-Ayam Al-Bid), the thirteenth, fourteenth and fifteenth."
Chapter 85: Fasting Two days Of The Month
"I asked the Messenger of Allah about fasting and he said: 'Fast one day of the month.' I said: 'Fast one day of the month.' I said: 'O Messenger of Allah, let me do more, let me do more.' He said: 'Let me do more, let mo do more; I am able for it.' Then the Messenger of Allah fell silent until I thought that he was going to refuse my request. Then he said: 'fast three days of each month."'
"Fast one day of each month." He asked him for more, saying: "May my father and mother be ransomed for you, I am able." He said: "Fast two days of each month." He said" May my father and mother be sacrificed for you, O Messenger of Allah, I am able." The Messenger of Allah said: "I am able, I am able." He did not want to increase it, but when I insisted, the Messenger of Allah said: "Fast three days of each month." (Sahih)The end of what the Shaikh had about fasting, all praise is due to Allah the Lord of the worlds.