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suyuti:8440a
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السيوطي:٨٤٤٠a

"إِنْ عِشْنا خَالَفْنَاهُمْ وصُمْنَا اليَوْمَ التَّاسِعَ" .  

[طب] الطبرانى في الكبير عن ابن عباس

See similar narrations below:

Collected by Ṭabarānī

أَبُو الْمِنْهَالِ، عَنِ ابْنِ عَبَّاسٍ

tabarani:11266[Chain 1] al-ʿAbbās b. al-Faḍl al-Asfāṭī > ʿAbd al-Raḥman b. al-Mubārak al-ʿAyshī [Chain 2] Mūsá b. Hārūn > Dāwud b. ʿAmr al-Ḍabbī > Muslim b. Khālid al-Zanjī > Ismāʿīl b. Umayyah > Abū al-Minhāl > Ibn ʿAbbās > Dhukir Lilnnabī ﷺ > Yahūd Yaṣūmūn Yawm ʿĀshūrāʾ

[Machine] The Prophet ﷺ was informed that the Jews used to fast on the day of Ashura. He ﷺ said, "If we live, we will oppose them and fast on the ninth day."  

الطبراني:١١٢٦٦حَدَّثَنَا الْعَبَّاسُ بْنُ الْفَضْلِ الْأَسْفَاطِيُّ ثنا عَبْدُ الرَّحْمَنِ بْنُ الْمُبَارَكِ الْعَيْشِيُّ ح وَحَدَّثَنَا مُوسَى بْنُ هَارُونَ ثنا دَاوُدُ بْنُ عَمْرٍو الضَّبِّيُّ قَالَا ثنا مُسْلِمُ بْنُ خَالِدٍ الزَّنْجِيُّ عَنْ إِسْمَاعِيلَ بْنِ أُمَيَّةَ عَنْ أَبِي الْمِنْهَالِ عَنِ ابْنِ عَبَّاسٍ قَالَ

ذُكِرَ لِلنَّبِيِّ ﷺ أَنَّ يَهُودَ يَصُومُونَ يَوْمَ عَاشُورَاءَ فَقَالَ النَّبِيُّ ﷺ «إِنْ عِشْنا خالَفْنَاهُمْ وَصُمْنَا الْيَوْمَ التَّاسِعَ»