It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Holy Prophet (peace and blessings be upon him) said: It is not permissible to sever relations for more than three days. Whoever severs relations with his brother for more than three days and dies in that state will enter Hell.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 9881
Hadith Gradingحکم دارالسلام:رجاله ثقات لكن شك منصور في رفعه، فالصحيح من المرفوع هو قوله: « لا هجرة بعد ثلاث » ، م: 2562