Sahih Muslim 193
صحيح مسلم#193Sahihوَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ الْحَارِثِ الْمَخْزُومِيُّ، عَنِ ابْنِ جُرَيْجٍ، قَالَ أَخْبَرَنِي أَبُو الزُّبَيْرِ، أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " غِلَظُ الْقُلُوبِ وَالْجَفَاءُ فِي الْمَشْرِقِ وَالإِيمَانُ فِي أَهْلِ الْحِجَازِ " .
It is reported on the authority of Jabir b. Abdullah that the Messenger of Allah (may peace and, blessings be upon him) observed:The callousness of heart and sternness is in the East and faith is among the people of the Hijaz
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: 1:100