"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?"' (Using translation from Nasāʾī 2429)
أُتِيَ النَّبِيُّ ﷺ بِأَرْنَبٍ قَدْ شَوَاهَا رَجُلٌ فَلَمَّا قَدَّمَهَا إِلَيْهِ قَالَ يَا رَسُولَ اللهِ إِنِّي رَأَيْتُ بِهَا دَمًا فَتَرَكَهَا رَسُولُ اللهِ ﷺ فَلَمْ يَأْكُلْهَا وَقَالَ لِمَنْ عِنْدَهُ «كُلُوا فَإِنِّي لَوْ اشْتَهَيْتُهَا أَكَلْتُهَا» وَرَجُلٌ جَالِسٌ فَقَالَ رَسُولُ اللهِ ﷺ «ادْنُ فَكُلْ مَعَ الْقَوْمِ» فَقَالَ يَا رَسُولَ اللهِ إِنِّي صَائِمٌ قَالَ «فَهَلَّا صُمْتَ الْبِيضَ؟» قَالَ وَمَا هُنَّ؟ قَالَ «ثَلَاثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ»