Abu Hurairah, may Allah be pleased with him, narrates that the Messenger of Allah, peace and blessings be upon him, said: "By Allah! He is not a believer, by Allah! He is not a believer, by Allah! He is not a believer." It was asked: O Messenger of Allah! Who (is not a believer)? He, peace and blessings be upon him, said: "The one whose neighbor is not safe from his mischief." Agreed upon.
Hadith Referenceمشكوة المصابيح / كتاب الآداب / 4962
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 (6016) [و مسلم (46/73) بلفظ آخر، و لفظ المشکوة لم أجد عنده]»