Al-Bara' told that he heard God's messenger say, "Only a believer loves the Ansar and only a hypocrite hates them, so he who loves them is loved by God and he who hates them is hated by God." (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب المناقب / 6216
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (3783) و مسلم (129/ 75)»