Sahih Muslim 1028
صحيح مسلم#1028Sahihوَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَمُحَمَّدُ بْنُ رَافِعٍ، - وَاللَّفْظُ لاِبْنِ رَافِعٍ - قَالاَ حَدَّثَنَا يَحْيَى بْنُ آدَمَ، حَدَّثَنَا زُهَيْرٌ، عَنْ سِمَاكٍ، قَالَ سَأَلْتُ جَابِرَ بْنَ سَمُرَةَ عَنْ صَلاَةِ النَّبِيِّ، صلى الله عليه وسلم فَقَالَ كَانَ يُخَفِّفُ الصَّلاَةَ وَلاَ يُصَلِّي صَلاَةَ هَؤُلاَءِ . قَالَ وَأَنْبَأَنِي أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَقْرَأُ فِي الْفَجْرِ بـ { ق وَالْقُرْآنِ} وَنَحْوِهَا .
Simak asked Jabir b. Samura about the prayer of the Apostle (ﷺ). He said:He (the Holy Prophet) shortened the prayer and he did not pray like these people then, and he informed me that the Messenger of Allah (ﷺ) used to recite" Qaf. By the (Glorious) Qur'an," and a passage of similar length
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: 4:190