Source: Sahih Al-Bukhari 2847, Sahih Muslim 2406
Grade: Muttafaqun Alayhi (Authenticity agreed upon) according to Al-Bukhari and Muslim
📖 Abu Huraira RadhiAllahu 'anhu narrated: Allah's noble Messenger Muhammad SallAllahu 'alaihi wa sallam said, "The believer is a mirror to his faithful brother. He protects him against loss and defends him behind his back."
Abu Huraira RadhiAllahu 'anhu 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
📖 Abu Sa’eed Al-Khudri RadhiAllahu 'anhu narrated: Allah's noble Messenger Muhammad SallAllahu 'alaihi wa sallam said, "Whoever among you sees evil, let him change it with his hand (by stopping it physically). If he is unable to do so, then with his tongue (by warning or speaking against that wrongdoing). If he is unable to do so, then with his heart (by hating the sin), and that is the weakest level of faith."
Source: Sahih Muslim 49
Grade: Sahih (Authentic) according to Muslim