Sahih Muslim 236
صحيح مسلم#236Sahihحَدَّثَنَا يَحْيَى بْنُ حَبِيبٍ الْحَارِثِيُّ، حَدَّثَنَا خَالِدٌ، - يَعْنِي ابْنَ الْحَارِثِ - حَدَّثَنَا شُعْبَةُ، عَنْ عَبْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ، عَنْ أَنَسٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ قَالَ " حُبُّ الأَنْصَارِ آيَةُ الإِيمَانِ وَبُغْضُهُمْ آيَةُ النِّفَاقِ " .
It is narrated on the authority of Anas that the Apostle (may peace and blessings be upon him) said:The love of the Ansar is the sign of faith and hatred against them is the sign of dissemblance
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: 1:142