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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
suyuti:11135a –
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السيوطي:١١١٣٥a –

"الشَّهْرُ ثَلاثُونَ والشَّهْرُ تِسعٌ وعِشْرُونَ فإِنَّ غُمَّ عَلَيكمْ فَعُدُّوا ثَلاثينَ".  

[حب] ابن حبّان عن ابن عمر

See similar narrations below:

Collected by Ibn Ḥibbān, Suyūṭī

ذِكْرُ الْبَيَانِ بِأَنَّ قَوْلَهُ ﷺ «تِسْعٌ وَعِشْرُونَ» أَرَادَ بَعْضَ الشَّهْرِ لَا الْكَلَّ

ibnhibban:3451 – ʿUmar b. Muḥammad al-Hamdānī > al-Ḥusayn b. ʿAlī al-ʿIjlī > Ibn Numayr from his father > ʿUbaydullāh b. ʿUmar > Nāfiʿ > Ibn ʿUmar

[Machine] The Messenger of Allah ﷺ said, "The month is thirty days, and if it is obscured to you, then complete the count as thirty."  

ابن حبّان:٣٤٥١ – أَخْبَرَنَا عُمَرُ بْنُ مُحَمَّدٍ الْهَمْدَانِيُّ قَالَ حَدَّثَنَا الْحُسَيْنُ بْنُ عَلِيٍّ الْعِجْلِيُّ قَالَ حَدَّثَنَا ابْنُ نُمَيْرٍ عَنْ أَبِيهِ عَنْ عُبَيْدِ اللَّهِ بْنِ عُمَرَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ «الشَّهْرُ ثَلَاثُونَ وَالشَّهْرُ تِسْعٌ وَعِشْرُونَ فَإِنْ غُمَّ عَلَيْكُمْ فَعُدُّوا ثَلَاثِينَ»