Hadith on Brotherhood: Believer is a mirror to his brother

Abu Huraira reported: The Prophet, peace and blessings be upon him, said, “The believer is a mirror to his faithful brother. He protects him against loss and defends him behind his back.”

Abu Huraira said, “The believer is a mirror to his brother. If he sees something wrong in him, he should correct it.”

Source: al-Adab al-Mufrad 239

Grade: Hasan (fair) according to Al-Albani

عَنْ أَبِي هُرَيْرَةَ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ‏ الْمُؤْمِنُ مَرْآةُ أَخِيهِ وَالْمُؤْمِنُ أَخُو الْمُؤْمِنِ يَكُفُّ عَلَيْهِ ضَيْعَتَهُ وَيَحُوطُهُ مِنْ وَرَائِهِ

وقال أبو هريرة الْمُؤْمِنُ مَرْآةُ أَخِيهِ إِذَا رَأَى فِيهَا عَيْبًا أَصْلَحَهُ

239 الأدب المفرد للبخاري باب المسلم مرآة أخيه

178 المحدث الألباني خلاصة حكم المحدث حسن في صحيح الأدب المفرد