(120) بَابُ الْمُسْلِمُ مَرْآةُ أَخِيهِ
Abu Hurayra reported that the Prophet, may Allah bless him andgrant him peace, said, "A believer is the mirror of his brother. A believeris the brother of another believer. He protects him against loss and defendshim behind his back." (ES)
Reference (ES): Al-Adab Al-Mufrad 239 (ES)
In-book reference (ES): Book 12, Hadith 2 (ES)
English translation (ES): Book 12, Hadith 239 (ES)