Sahih Muslim 103
صحيح مسلم#103Sahihحَدَّثَنِي عَبْدُ اللَّهِ بْنُ هَاشِمٍ الْعَبْدِيُّ، حَدَّثَنَا بَهْزٌ، حَدَّثَنَا سُلَيْمَانُ بْنُ الْمُغِيرَةِ، عَنْ ثَابِتٍ، قَالَ قَالَ أَنَسٌ كُنَّا نُهِينَا فِي الْقُرْآنِ أَنْ نَسْأَلَ رَسُولَ اللَّهِ صلى الله عليه وسلم عَنْ شَىْءٍ . وَسَاقَ الْحَدِيثَ بِمِثْلِهِ .
It is narrated on the authority of Thabit that Anas said:We were forbidden in the Holy Qur'an that we should ask about anything from the Messenger of Allah (ﷺ) and then Anas reported the hadith in similar words
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: 1:11