Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "It is not permissible for a Muslim to cut himself off from his brother for more than three days."
Ahmad, Abu Ya'la, al-Bazzar and al-Tabarani recorded it; the narrators of Ahmad are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدب / 12968
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه البزار فى المسند (12051) اخرجه الطبراني فى المعجم الكبير (324) اخرجه احمد فى المسند (1519 و 1589) ، أخرجه مسند أحمد برقم: 1592، 12280»