Sahih Muslim 866
صحيح مسلم#866Sahihوَحَدَّثَنَاهُ مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ، عَنْ سَعِيدٍ، عَنْ قَتَادَةَ، بِهَذَا الإِسْنَادِ أَنَّهُ رَأَى نَبِيَّ اللَّهِ صلى الله عليه وسلم وَقَالَ حَتَّى يُحَاذِيَ بِهِمَا فُرُوعَ أُذُنَيْهِ .
This hadith has been transmitted by Qatada with the same chain of transmitters that he saw the Messenger of Allah (ﷺ) doing this (i.e. raising his hands) till they were opposite the lobes of ears
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: 4:29