From Sahih Bukhari (Hadith 3783):
Narrated Al-Bara:I heard the Prophet (ﷺ) saying (or the Prophet (ﷺ) said), "None loves the Ansar but a believer, and none hates them but a hypocrite. So Allah will love him who loves them, and He will hate him who hates them
Reference: Bukhari 3783