Sunan an-Nasa'i 948
سنن النسائي#948Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ إِسْمَاعِيلَ بْنِ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا يَزِيدُ، قَالَ أَنْبَأَنَا سُلَيْمَانُ التَّيْمِيُّ، عَنْ سَيَّارٍ، - يَعْنِي ابْنَ سَلاَمَةَ - عَنْ أَبِي بَرْزَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَقْرَأُ فِي صَلاَةِ الْغَدَاةِ بِالسِّتِّينَ إِلَى الْمِائَةِ .
It was narrated from Abu Barzah that:The Messenger of Allah (ﷺ) used to recite between sixty and one hundred verses in Al-Ghadah (Subh) prayer
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:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 11:73