Sahih Muslim Book - 13, Hadith - 2719

وَحَدَّثَنِى أَبُو الرَّبِيعِ الزَّهْرَانِىُّ حَدَّثَنَا حَمَّادٌ عَنْ أَيُّوبَ وَهِشَامٍ عَنْ مُحَمَّدٍ عَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ - قَالَ حَمَّادٌ وَأَظُنُّ أَيُّوبَ قَدْ سَمِعَهُ مِنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ - قَالَ سَأَلْتُ عَائِشَةَ - رضى الله عنها - عَنْ صَوْمِ النَّبِىِّ -صلى الله عليه وسلم- فَقَالَتْ كَانَ يَصُومُ حَتَّى نَقُولَ قَدْ صَامَ قَدْ صَامَ. وَيُفْطِرُ حَتَّى نَقُولَ قَدْ أَفْطَرَ قَدْ أَفْطَرَ - قَالَتْ - وَمَا رَأَيْتُهُ صَامَ شَهْرًا كَامِلاً مُنْذُ قَدِمَ الْمَدِينَةَ إِلاَّ أَنْ يَكُونَ رَمَضَانَ.

It was narrated that ‘Abdullah bin Shaqiq said: “I asked ‘Aishah [may Allah be pleased with her] about the fasting of the Prophet and she said: ‘He used to fast until we said: “He has fasted, he has fasted,” and he would not fast until we said: “He is not fasting, he is not fasting.”’ She said: ‘And I did not see him fast an entire month, since he came to Al-Madinah, unless it was Ramadan.’’”’