(33) باب الدَّلِيلِ عَلَى أَنَّ حُبَّ الأَنْصَارِ وَعَلِيٍّ رَضِيَ اللَّهُ عَنْهُمْ مِنَ الإِيمَانِ وَعَلاَمَاتِهِ وَبُغْضَهُمْ مِنْ عَلاَمَاتِ 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.
Reference: Sahih Muslim 74 b
In-book reference: Book 1, Hadith 142
USC-MSA web (English) reference(deprecated numbering scheme): Book 1, Hadith 137