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.
suyuti:27236a
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السيوطي:٢٧٢٣٦a

"يَا عَلِىُّ: سَتُقَاتِلُكَ الْفِئَةُ الْبَاغِيَةُ وَأَنْتَ عَلَى الْحَقِّ، فَمَنْ لَمْ يَنْصُرْكَ يَوْمَئِذٍ فَلَيْسَ مِنِّى".  

ابن عساكر عن عمار بن ياسر

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Collected by Suyūṭī
suyuti:483-32bʿAmmār b. Yāsir > al-Nabi ﷺ
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السيوطي:٤٨٣-٣٢b

"عَنْ عَمَّارِ بْنِ يَاسِرٍ قَالَ: سَمِعْتُ النَّبِىَّ ﷺ يَقُولُ يَا عَلِىُّ سَتُقَاتِلُكَ الفِئَةُ البَاغِيَةُ وَأَنْتَ عَلَى الحقِّ، فَمَنْ لَمْ يَنْصُرْكَ يَوْمَئِذٍ فَلَيْسَ مِنِّى".  

[كر] ابن عساكر في تاريخه