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:2-430bQatādah > ʿUmar b. al-Khaṭṭāb > Man Zaʿam > Muʾmin Fahū Kāfir And Man Zaʿam
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السيوطي:٢-٤٣٠b

"عَنْ قَتَادَةَ أَنَّ عُمَرَ بْنَ الْخَطَّابِ قَالَ: مَنْ زَعَمَ أَنَّهُ مُؤمِنٌ فَهُوَ كَافِرٌ، وَمَنْ زَعَمَ أنَّهُ فِي الْجَنَّةِ فَهُوَ فِى النَّارِ، وَمَنْ زَعَمَ أنَّهُ عالِمٌ فهُوَ جَاهِلٌ، فنَازَعَهُ رَجُلٌ، فَقَالَ: سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ: من زَعَمَ أَنَّهُ في الجَنَّةِ فَهُوَ فِي النَّارِ".  

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