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tirmidhi:866 – Sharīk > Abū Isḥāq > ʿAbdullāh b. Saʿīd b. Jubayr from his father > Ibn ʿAbbās

"Whoever performed Tawaf around the House fifty time, he will be as free of his sins as the day his mother bore him."  

الترمذي:٨٦٦ – يَحْيَى بْنُ يَمَانٍ عَنْ شَرِيكٍ عَنْ أَبِي إِسْحَاقَ عَنْ عَبْدِ اللَّهِ بْنِ سَعِيدِ بْنِ جُبَيْرٍ عَنْ أَبِيهِ عَنِ ابْنِ عَبَّاسٍ قَالَ قَالَ

رَسُولُ اللَّهِ ﷺ مَنْ طَافَ بِالْبَيْتِ خَمْسِينَ مَرَّةً خَرَجَ مِنْ ذُنُوبِهِ كَيَوْمِ وَلَدَتْهُ أُمُّهُ قَالَ وَفِي الْبَابِ عَنْ أَنَسٍ وَابْنِ عُمَرَ  

قَالَ أَبُو عِيسَى حَدِيثُ ابْنِ عَبَّاسٍ حَدِيثٌ غَرِيبٌ سَأَلْتُ مُحَمَّدًا عَنْ هَذَا الْحَدِيثِ فَقَالَ إِنَّمَا يُرْوَى هَذَا عَنِ ابْنِ عَبَّاسٍ قَوْلُهُ

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Collected by Suyūṭī
suyuti:420-244b – Ibn ʿAbbās
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السيوطي:٤٢٠-٢٤٤b –

"عَن ابْنِ عَبَّاسٍ أَنَّ رَسُولَ اللهِ ﷺ قَالَ: مَنْ طَافَ خَمسِينَ سُبُوعًا، خَرَجَ مِنْ ذُنُوبِهِ كيَوْمَ وَلَدَتْهُ أُمُّهُ".  

ابن زنجويه