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:10438a
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السيوطي:١٠٤٣٨a

"الْجُمُعَةُ عَلَى الْخَمْسِين رَجُلًا، وَلَيسَ عَلَى مَا دُونَ الْخَمسِينَ جُمُعَة".  

[طب] الطبرانى في الكبير عن أَبي أمَامةَ

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Collected by Ṭabarānī
tabarani:7952al-Ḥusayn b. Isḥāq al-Tustarī > Sahl b. ʿUthmān > Marwān b. Muʿāwiyah > Jaʿfar b. al-Zubayr > al-Qāsim > Abū Umāmah

[Machine] The Messenger of Allah ﷺ said, "Jumu'ah (Friday prayer) is obligatory upon fifty men, and it is not obligatory for less than fifty men."  

الطبراني:٧٩٥٢حَدَّثَنَا الْحُسَيْنُ بْنُ إِسْحَاقَ التُّسْتَرِيُّ ثنا سَهْلُ بْنُ عُثْمَانَ ثنا مَرْوَانُ بْنُ مُعَاوِيَةَ عَنْ جَعْفَرِ بْنِ الزُّبَيْرِ عَنِ الْقَاسِمِ عَنْ أَبِي أُمَامَةَ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «الْجُمُعَةُ عَلَى الْخَمْسِينَ رَجُلًا وَلَيْسَ عَلَى مَا دُونَ الْخَمْسِينَ جُمُعَةٌ»