Sunan an-Nasa'i 907
سنن النسائي#907Sahihأَخْبَرَنَا عَبْدُ اللَّهِ بْنُ سَعِيدٍ أَبُو سَعِيدٍ الأَشَجُّ، قَالَ حَدَّثَنِي عُقْبَةُ بْنُ خَالِدٍ، قَالَ حَدَّثَنَا شُعْبَةُ، وَابْنُ أَبِي عَرُوبَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ صَلَّيْتُ خَلْفَ رَسُولِ اللَّهِ صلى الله عليه وسلم وَأَبِي بَكْرٍ وَعُمَرَ وَعُثْمَانَ - رضى الله عنهم - فَلَمْ أَسْمَعْ أَحَدًا مِنْهُمْ يَجْهَرُ بِـ { بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ } .
It was narrated that Anas said:"I prayed behind the Messenger of Allah (ﷺ), Abu Bakr, Umar and Uthman, may Allah be pleased with them, and I did not hear any of them say out loud: In the Name of Allah, The Most Gracious, The Most Merciful
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 11:32