Sahih al-Bukhari 17
صحيح البخاري#17Sahihحَدَّثَنَا أَبُو الْوَلِيدِ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنِي عَبْدُ اللَّهِ بْنُ عَبْدِ اللَّهِ بْنِ جَبْرٍ، قَالَ سَمِعْتُ أَنَسًا، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " آيَةُ الإِيمَانِ حُبُّ الأَنْصَارِ، وَآيَةُ النِّفَاقِ بُغْضُ الأَنْصَارِ ".
Narrated Anas: The Prophet (ﷺ) said, "Love for the Ansar is a sign of faith and hatred for the Ansar is a sign of hypocrisy
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 al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 2:10