آداب الخلاف
Abu Khirāsh Hadrad al-Aslami (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: “Whoever forsakes his brother for a year is like shedding his blood.”  
عن أبي خِراش حَدْرَدِ بن أبي حَدْرَدٍ الأسْلَمِي -رضي الله عنه- مرفوعاً: «من هَجَر أخَاه سَنَة فهو كَسَفْكِ دَمِهِ».

شرح الحديث :


The one who abandons his brother for a year for no Shariah-approved excuse deserves punishment, just like shedding his blood . The punishment due here is a discretionary punishment, out of retribution and deterrence. Nevertheless, if there is a Shariah-approved excuse, like practicing religious innovations and immoralities, then forsaking such people must continue as long as they do not repent and return to the truth.  

ترجمة نص هذا الحديث متوفرة باللغات التالية