It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) established brotherhood between the Muhajirun and the Ansar in our house in Madinah Munawwarah. Abdur Rahman says that this hadith was narrated to us by Abu Ibrahim Mu'aqqib, who was an excellent person, and Abu Abdur Rahman greatly praised him.