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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bayhaqi:2378 – Abū ʿAbdullāh al-Ḥāfiẓ > Abū ʿAmr Muḥammad b. Aḥmad b. Isḥāq al-ʿAdl > Muḥammad b. al-Ḥasan b. Qutaybah > Muḥammad b. ʿAmr al-Ghazzī > al-Walīd b. Muslim > Ibn Jurayj > ʿAmr b. Dīnār > Saʿīd b. Jubayr > Ibn ʿAbbās

[Machine] The Muslims did not know the end of the chapter until "Bismillah ir-Rahman ir-Rahim" was revealed. When "Bismillah ir-Rahman ir-Rahim" was revealed, they knew that the chapter had ended, and so on.  

البيهقي:٢٣٧٨ – أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي أَبُو عَمْرٍو مُحَمَّدُ بْنُ أَحْمَدَ بْنِ إِسْحَاقَ الْعَدْلُ ثنا مُحَمَّدُ بْنُ الْحَسَنِ بْنِ قُتَيْبَةَ ثنا مُحَمَّدُ بْنُ عَمْرٍو الْغَزِّيُّ ثنا الْوَلِيدُ بْنُ مُسْلِمٍ ثنا ابْنُ جُرَيْجٍ ثنا عَمْرُو بْنُ دِينَارٍ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ ؓ قَالَ

كَانَ الْمُسْلِمُونَ لَا يَعْلَمُونَ انْقِضَاءَ السُّورَةِ حَتَّى تَنْزِلَ بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ فَإِذَا نَزَلَتْ بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ عَلِمُوا أَنَّ السُّورَةَ قَدِ انْقَضَتْ وَكَذَلِكَ  

رَوَاهُ دُحَيْمُ بْنُ النُّعَيْمِ عَنِ الْوَلِيدِ بْنِ مُسْلِمٍ إِلَّا أَنَّهُ قَصَرَ بِهِ فَلَمْ يَذْكُرُ سَعِيدَ بْنَ جُبَيْرٍ فِي إِسْنَادِهِ

See similar narrations below:

Collected by Ḥākim
hakim:846 – Abū ʿAlī al-Ḥusayn b. ʿAlī al-Ḥāfiẓ > Muḥammad b. Muḥammad b. Sulaymān > Raḥīm b. al-Yatīm > Abū ʿAmr Muḥammad b. Aḥmad b. Isḥāq al-ʿAdl > Muḥammad b. al-Ḥasan b. Qutaybah > Muḥammad b. ʿAmr al-Ḍarīr > al-Walīd b. Muslim > Ibn Jurayj > ʿAmr b. Dīnār > Saʿīd b. Jubayr > Ibn ʿAbbās > Kān

[Machine] "The Muslims did not know the completion of a Surah until the Bismillah ar-Rahman ar-Rahim was revealed. When the Bismillah ar-Rahman ar-Rahim was revealed, they knew that the Surah had been completed." No mention was made of Rahim, Sa'id bin Jubayr."  

الحاكم:٨٤٦ – حَدَّثَنَا أَبُو عَلِيٍّ الْحُسَيْنُ بْنُ عَلِيٍّ الْحَافِظُ أَنْبَأَ مُحَمَّدُ بْنُ مُحَمَّدِ بْنِ سُلَيْمَانَ ثنا رَحِيمُ بْنُ الْيَتِيمِ وَأَخْبَرَنَا أَبُو عَمْرٍو مُحَمَّدُ بْنُ أَحْمَدَ بْنِ إِسْحَاقَ الْعَدْلُ ثنا مُحَمَّدُ بْنُ الْحَسَنِ بْنِ قُتَيْبَةَ ثنا مُحَمَّدُ بْنُ عَمْرٍو الضَّرِيرُ قَالَا ثنا الْوَلِيدُ بْنُ مُسْلِمٍ ثنا ابْنُ جُرَيْجٍ ثنا عَمْرُو بْنُ دِينَارٍ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

«كَانَ الْمُسْلِمُونَ لَا يَعْلَمُونَ انْقِضَاءَ السُّورَةِ حَتَّى تَنْزِلَ بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ فَإِذَا نَزَلَتْ بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ عَلِمُوا أَنَّ السُّورَةَ قَدِ انْقَضَتْ» وَلَمْ يَذْكُرْ رَحِيمٌ سَعِيدَ بْنَ جُبَيْرٍ  

هَذَا حَدِيثٌ صَحِيحٌ عَلَى شَرْطِ الشَّيْخَيْنِ وَلَمْ يُخَرِّجَاهُ