Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bayhaqi:8201 – Abū al-Ḥasan ʿAlī b. Aḥmad b. Muḥammad b. Dāwud al-Razzāz Fīmā > ʿAlayh from Aṣl Kitābih> Abū ʿAmr b. al-Sammāk > Ḥāmid b. Sahl al-Thaghrī > Abū Ghassān Mālik b. Ismāʿīl > Isḥāq b. Saʿīd > Saʿīd > ʿĀʾishah

[Machine] It was said to her, "O Mother of the Believers, does the month of Ramadan last twenty-nine days?" She replied, "I did not fast with the Messenger of Allah ﷺ for twenty-nine days more than I fasted for thirty days. And it has been narrated to us from Abdullah ibn Mas'ud something similar to this."  

البيهقي:٨٢٠١ – أَخْبَرَنَا أَبُو الْحَسَنِ عَلِيُّ بْنُ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ دَاوُدَ الرَّزَّازُ فِيمَا قَرَأْتُ عَلَيْهِ مِنْ أَصْلِ كِتَابِهِ بِبَغْدَادَ ثنا أَبُو عَمْرِو بْنُ السَّمَّاكِ ثنا حَامِدُ بْنُ سَهْلٍ الثَّغْرِيُّ ثنا أَبُو غَسَّانَ مَالِكُ بْنُ إِسْمَاعِيلَ ثنا إِسْحَاقُ بْنُ سَعِيدٍ ثنا سَعِيدٌ عَنْ عَائِشَةَ قَالَ

قِيلَ لَهَا يَا أُمَّ الْمُؤْمِنِينَ أَيَكُونُ شَهْرُ رَمَضَانَ تِسْعًا وَعِشْرِينَ؟ فَقَالَتْ مَا صُمْتُ مَعَ رَسُولِ اللهِ ﷺ تِسْعًا وَعِشْرِينَ أَكْثَرَ مِمَّا صُمْتُ ثَلَاثِينَ وَرُوِّينَا عَنْ عَبْدِ اللهِ بْنِ مَسْعُودٍ مِثْلَ هَذَا  

See similar narrations below:

Collected by Aḥmad
ahmad:24518 – Hāshim b. al-Qāsim > Isḥāq b. Saʿīd from his father

[Machine] It was said to Aisha, "O mother of the believers, the month has been seen, it is for twenty-nine." She said, "What surprises you about that, when I fasted with the Messenger of Allah ﷺ for twenty-nine, even more than I fasted for thirty."  

أحمد:٢٤٥١٨ – حَدَّثَنَا هَاشِمُ بْنُ الْقَاسِمِ قَالَ حَدَّثَنَا إِسْحَاقُ بْنُ سَعِيدٍ عَنْ أَبِيهِ قَالَ

قِيلَ لِعَائِشَةَ يَا أُمَّ الْمُؤْمِنِينَ رُئِيَ هَذَا الشَّهْرُ لِتِسْعٍ وَعِشْرِينَ قَالَتْ وَمَا يُعْجِبُكُمْ مِنْ ذَاكَ لَمَا صُمْتُ مَعَ رَسُولِ اللهِ ﷺ تِسْعًا وَعِشْرِينَ أَكْثَرُ مِمَّا صُمْتُ ثَلَاثِينَ  

ahmad:24597 – Hāshim > Isḥāq b. Saʿīd from his father

[Machine] It was said to Aisha, "O Mother of the Believers, this month is 29 days." She replied, "And what surprises you about that? When I fasted with the Messenger of Allah ﷺ, we fasted for 29 days, and sometimes even 30 days."  

أحمد:٢٤٥٩٧ – حَدَّثَنَا هَاشِمٌ حَدَّثَنَا إِسْحَاقُ بْنُ سَعِيدٍ عَنْ أَبِيهِ قَالَ

قِيلَ لِعَائِشَةَ يَا أُمَّ الْمُؤْمِنِينَ هَذَا الشَّهْرُ تِسْعٌ وَعِشْرُونَ قَالَتْ وَمَا يُعْجِبُكُمْ مِنْ ذَلِكَ لَمَا صُمْتُ مَعَ رَسُولِ اللهِ ﷺ تِسْعًا وَعِشْرِينَ أَكْثَرُ مِمَّا صُمْتُ ثَلَاثِينَ