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.
bayhaqi:2822al-Shaykh ؒ Taʿālá And ʾAmmā Mā 2822 > Abū ʿAbdullāh al-Ḥāfiẓ > Aḥmad b. Salmān al-Faqīh > Muḥammad b. Ghālib Wamūsá b. al-Ḥasan > Abū Ḥudhayfah > Sufyān > ʿAbd al-Raḥman b. Ziyād > Bakr b. Sawādah > ʿAbdullāh b. ʿAmr b. al-ʿĀṣ

[Machine] The Messenger of Allah ﷺ said, "When the Imam sits in the last Rak'ah of his prayer, then speaks before saying the Tashahhud, his prayer is invalidated, and this is a weak narration reported by Al-Qa'nabi from Al-Ifrigi."  

البيهقي:٢٨٢٢قَالَ الشَّيْخُ رَحِمَهُ اللهُ تَعَالَى وَأَمَّا مَا 2822 أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا أَحْمَدُ بْنُ سَلْمَانَ الْفَقِيهُ ثنا مُحَمَّدُ بْنُ غَالِبٍ وَمُوسَى بْنُ الْحَسَنِ قَالَا ثنا أَبُو حُذَيْفَةَ ثنا سُفْيَانُ عَنْ عَبْدِ الرَّحْمَنِ بْنِ زِيَادٍ عَنْ بَكْرِ بْنِ سَوَادَةَ عَنْ عَبْدِ اللهِ بْنِ عَمْرِو بْنِ الْعَاصِ ؓ قَالَ

قَالَ رَسُولُ اللهِ ﷺ إِذَا قَعَدَ الْإِمَامُ فِي آخِرِ رَكْعَةٍ مِنْ صَلَاتِهِ ثُمَّ أَحْدَثَ قَبْلَ أَنْ يَتَشَهَّدَ فَقَدْ تَمَّتْ صَلَاتُهُ فَهُوَ حَدِيثٌ ضَعِيفٌ وَرَوَاهُ الْقَعْنَبِيُّ عَنِ الْإِفْرِيقِيِّ  


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Collected by Suyūṭī
suyuti:2365a
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السيوطي:٢٣٦٥a

"إذَا قعدَ الإمامُ في آخِر رَكْعَةٍ مِنْ صلاتِه ثُمَّ أحدثَ قبلَ أنْ يتشهدَ فقد تمت صلاتُه".  

[ق] البيهقى في السنن وضعفه عن ابن عمرو