It was narrated that Musa bin Talhah said: “A rabbit that a man had grilled was brought to the Prophet and when he offered it to him he said: ‘Messenger of Allah صلی اللہ علیہ وآلہ وسلم, I saw some blood on it.’ The Messenger of Allah صلی اللہ علیہ وآلہ وسلم 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 صلی اللہ علیہ وآلہ وسلم said: ‘Come and eat with the people.’ He said: ‘Messenger of Allah صلی اللہ علیہ وآلہ وسلم, I am fasting.’ He said:
‘Why don’t you fast Al-Baiz?’ He said: ‘What are they?’ He said: ‘The thirteenth, fourteenth and fifteenth?” (Sahih)