Abu Khirash Salmi (may Allah be pleased with him) reports that he heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever severs contact with his brother for a whole year, it is as if he has shed his blood." Hasan, narrated by Abu Dawood.
Hadith Referenceمشكوة المصابيح / كتاب الآداب / 5036
Hadith Gradingالألبانی:إِسْنَاده لين | زبیر علی زئی:حسن
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «حسن، رواه أبو داود (4915)»