Sahih Muslim 1356
صحيح مسلم#1356Sahihقَالَ مُسْلِمٌ وَحُدِّثْتُ عَنْ يَحْيَى بْنِ حَسَّانَ، وَيُونُسَ الْمُؤَدِّبِ، و غَيْرِهِمَا قَالُوا حَدَّثَنَا عَبْدُ الْوَاحِدِ بْنُ زِيَادٍ، قَالَ حَدَّثَنِي عُمَارَةُ بْنُ الْقَعْقَاعِ، حَدَّثَنَا أَبُو زُرْعَةَ، قَالَ سَمِعْتُ أَبَا هُرَيْرَةَ، يَقُولُ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا نَهَضَ مِنَ الرَّكْعَةِ الثَّانِيَةِ اسْتَفْتَحَ الْقِرَاءَةَ بِـ { الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ} وَلَمْ يَسْكُتْ .
Abu Huraira reported that when the Messenger of Allah (ﷺ) stood up for the second rak'ah he opened it with the recitation of the praise of Allah, the Lord of universe (al-Fatiha), and he did not observe silence (before the recitation of al-Fatiha)
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:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 5:191