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
nasai:908 – Ismāʿīl b. Masʿūd > Khālid > ʿUthmān b. Ghiyāth from my father

"If Abdullah bin Mughaffal heard any one of us recite: 'In the Name of Allah, the Most Gracious, the Most Merciful', he would say: 'I prayed behind the Messenger of Allah ﷺ and behind Abu Bakr and behind Umar-may Allah be pleased with them both- and I did not hear any of them recite: 'In the Name of Allah, the Most Gracious, the Most Merciful."  

النسائي:٩٠٨ – أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ قَالَ حَدَّثَنَا خَالِدٌ قَالَ حَدَّثَنَا عُثْمَانُ بْنُ غِيَاثٍ قَالَ أَخْبَرَنِي أَبُو نُعَامَةَ الْحَنَفِيُّ قَالَ حَدَّثَنَا ابْنُ عَبْدِ اللَّهِ بْنِ مُغَفَّلٍ قَالَ كَانَ عَبْدُ اللَّهِ بْنُ مُغَفَّلٍ إِذَا

سَمِعَ أَحَدَنَا يَقْرَأُ { بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ } يَقُولُ صَلَّيْتُ خَلْفَ رَسُولِ اللَّهِ ﷺ وَخَلْفَ أَبِي بَكْرٍ وَخَلْفَ عُمَرَ ؓ فَمَا سَمِعْتُ أَحَدًا مِنْهُمْ قَرَأَ بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ  

See similar narrations below:

Collected by Muslim, Aḥmad, Nasāʾī's Kubrá
muslim:399a – Muḥammad b. al-Muthanná And Ibn Bashhār > Ghundar > Ibn al-Muthanná > Muḥammad b. Jaʿfar > Shuʿbah > Qatādah > Anas

I observed prayer along with the Messenger of Allah ﷺ and with Abu Bakr, Umar and Uthman (may Allah be pleased with all of them), but I never heard any one of them reciting Bismillah-ir-Rahman-ir-Rahim loudly.  

مسلم:٣٩٩a – حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى وَابْنُ بَشَّارٍ كِلاَهُمَا عَنْ غُنْدَرٍ قَالَ ابْنُ الْمُثَنَّى حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ قَالَ سَمِعْتُ قَتَادَةَ يُحَدِّثُ عَنْ أَنَسٍ قَالَ

صَلَّيْتُ مَعَ رَسُولِ اللَّهِ ﷺ وَأَبِي بَكْرٍ وَعُمَرَ وَعُثْمَانَ فَلَمْ أَسْمَعْ أَحَدًا مِنْهُمْ يَقْرَأُ {بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ}  

ahmad:20545 – Yaḥyá b. Saʿīd > ʿUthmān b. Ghiyāth > Abū Naʿāmahaʿan Ibn ʿAbdullāh b. Mughaffal

[Machine] One of us heard someone saying "In the name of Allah, the Most Gracious, the Most Merciful" and he says "Eehee Eehee, I have prayed behind the Messenger of Allah ﷺ, Abu Bakr, and Umar, and I did not hear any of them saying "In the name of Allah, the Most Gracious, the Most Merciful."  

أحمد:٢٠٥٤٥ – حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ عَنْ عُثْمَانَ بْنِ غِيَاثٍ حَدَّثَنِي أَبُو نَعَامَةَعَنِ ابْنِ عَبْدِ اللهِ بْنِ مُغَفَّلٍ قَالَ كَانَ أَبُونَا إِذَا

سَمِعَ أَحَدًا مِنَّا يَقُولُ بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ يَقُولُ إِهِي إِهِي صَلَّيْتُ خَلْفَ رَسُولِ اللهِ ﷺ وَأَبِي بَكْرٍ وَعُمَرَ فَلَمْ أَسْمَعْ أَحَدًا مِنْهُمْ يَقُولُ بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ  

nasai-kubra:982 – Ismāʿīl b. Masʿūd > Khālid > ʿUthmān / Ibn Ghiyāth

"If Abdullah bin Mughaffal heard any one of us recite: 'In the Name of Allah, the Most Gracious, the Most Merciful', he would say: 'I prayed behind the Messenger of Allah ﷺ and behind Abu Bakr and behind Umar-may Allah be pleased with them both- and I did not hear any of them recite: 'In the Name of Allah, the Most Gracious, the Most Merciful." (Using translation from Nasāʾī 908)  

الكبرى للنسائي:٩٨٢ – أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ قَالَ حَدَّثَنَا خَالِدٌ قَالَ حَدَّثَنَا عُثْمَانُ وَهُوَ ابْنُ غِيَاثٍ قَالَ حَدَّثَنَا أَبُو نَعَامَةَ الْحَنَفِيُّ قَالَ حَدَّثَنَا ابْنُ عَبْدِ اللهِ بْنِ مُغَفَّلٍ قَالَ كَانَ عَبْدُ اللهِ بْنُ مُغَفَّلٍ إِذَا

سَمِعَ أَحَدًا يَقْرَأُ بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ يَقُولُ «صَلَّيْتُ خَلْفَ رَسُولِ اللهِ ﷺ وَخَلْفَ أَبِي بَكْرٍ وَخَلْفَ عُمَرَ فَمَا سَمِعْتُ أَحَدًا مِنْهُمْ قَرَأَ بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ»