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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
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[Machine] The Prophet of Allah ﷺ said, "An oath is either fulfilled or repented."  

البيهقي:١٩٨٣٩ – أَخْبَرَنَا أَبُو بَكْرِ بْنُ الْحَارِثِ الْفَقِيهُ أنبأ أَبُو مُحَمَّدٍ عَبْدُ اللهِ بْنُ مُحَمَّدِ بْنِ جَعْفَرِ بْنِ حَيَّانَ ثنا مُحَمَّدُ بْنُ مُوسَى الْحُلْوَانِيُّ ثنا سَلْمُ بْنُ جُنَادَةَ ثنا أَبُو مُعَاوِيَةَ ثنا بَشَّارُ بْنُ كِدَامٍ عَنْ مُحَمَّدِ بْنِ زَيْدٍ عَنِ ابْنِ عُمَرَ ؓ قَالَ

قَالَ رَسُولُ اللهِ ﷺ الْحَلِفُ حَنْثٌ أَوْ نَدَمٌ كَذَا  

رَوَاهُ بَشَّارُ بْنُ كِدَامٍ وَهُوَ أَخُو مِسْعَرَ بْنَ كِدَامٍ