Sunan an-Nasa'i, Volume 3, Book 22, Hadith 2431 (DarusSalam) ⓘ

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: '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?"'

أَخْبَرَنَا مُحَمَّدُ بْنُ إِسْمَاعِيلَ بْنِ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا يَعْلَى، عَنْ طَلْحَةَ بْنِ يَحْيَى، عَنْ مُوسَى بْنِ طَلْحَةَ، قَالَ أُتِيَ النَّبِيُّ صلى الله عليه وسلم بِأَرْنَبٍ قَدْ شَوَاهَا رَجُلٌ فَلَمَّا قَدَّمَهَا إِلَيْهِ قَالَ يَا رَسُولَ اللَّهِ إِنِّي قَدْ رَأَيْتُ بِهَا دَمًا فَتَرَكَهَا رَسُولُ اللَّهِ صلى الله عليه وسلم فَلَمْ يَأْكُلْهَا وَقَالَ لِمَنْ عِنْدَهُ ‏"‏ كُلُوا فَإِنِّي لَوِ اشْتَهَيْتُهَا أَكَلْتُهَا ‏"‏ ‏.‏ وَرَجُلٌ جَالِسٌ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ ادْنُ فَكُلْ مَعَ الْقَوْمِ ‏"‏ ‏.‏ فَقَالَ يَا رَسُولَ اللَّهِ إِنِّي صَائِمٌ ‏.‏ قَالَ ‏"‏ فَهَلاَّ صُمْتَ الْبِيضَ ‏"‏ ‏.‏ قَالَ وَمَا هُنَّ قَالَ ‏"‏ ثَلاَثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ ‏"‏ ‏.‏