(33) باب الدَّلِيلِ عَلَى أَنَّ حُبَّ الأَنْصَارِ وَعَلِيٍّ رَضِيَ اللَّهُ عَنْهُمْ مِنَ الإِيمَانِ وَعَلاَمَاتِهِ وَبُغْضَهُمْ مِنْ عَلاَمَاتِ النِّفَاقِ
It is reported on the authority of Anas that the Messenger of Allah (may peace and blessings Be upon him) observed:
The sign of a hypocrite is the hatred against the Ansar and the sign of a believer is the love for the Ansar.
Reference: Sahih Muslim 74 a
In-book reference: Book 1, Hadith 141
USC-MSA web (English) reference(deprecated numbering scheme): Book 1, Hadith 136