Sunan an-Nasai Book 22, Hadith 2428

أَخْبَرَنَا عَمْرُو بْنُ يَحْيَى بْنِ الْحَارِثِ، قَالَ حَدَّثَنَا الْمُعَافَى بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا الْقَاسِمُ بْنُ مَعْنٍ، عَنْ طَلْحَةَ بْنِ يَحْيَى، عَنْ مُوسَى بْنِ طَلْحَةَ، أَنَّ رَجُلاً، أَتَى النَّبِيَّ صلى الله عليه وسلم بِأَرْنَبٍ وَكَانَ النَّبِيُّ صلى الله عليه وسلم مَدَّ يَدَهُ إِلَيْهَا فَقَالَ الَّذِي جَاءَ بِهَا إِنِّي رَأَيْتُ بِهَا دَمًا ‏.‏ فَكَفَّ رَسُولُ اللَّهِ صلى الله عليه وسلم يَدَهُ وَأَمَرَ الْقَوْمَ أَنْ يَأْكُلُوا وَكَانَ فِي الْقَوْمِ رَجُلٌ مُنْتَبِذٌ فَقَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ مَا لَكَ ‏"‏ ‏.‏ قَالَ إِنِّي صَائِمٌ ‏.‏ فَقَالَ لَهُ النَّبِيُّ صلى الله عليه وسلم ‏"‏ فَهَلاَّ ثَلاَثَ الْبِيضِ ثَلاَثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ ‏"‏ ‏.‏

It was narrated from Musa bin Talhah that:a man brought a rabbit to the Prophet, and the prophet stretched out his hand toward it, then the one who had brought it said: "I saw some blood on it," So the Prophet drew his hand back, but he told the people to eat. Among the people there was a man who held back. The Prophet said: "What is the matter with you?" He said: "I am fasting." The Prophet said to him: "Why don't you fast on the three days of Al-Bid, the thirteenth, fourteenth and fifteenth?