Sayyiduna al-Bara' (may Allah be pleased with him) narrates: The first of the Muhajirun to come to us was Sayyiduna Mus'ab bin Umayr (may Allah be pleased with him), who belonged to Banu Abd al-Dar bin Qusayy. I asked him: "How is the Prophet (peace and blessings be upon him)?" He said: "He is in his place, and his companions are coming behind me."
Al-Tabarani recorded it, and its narrators are the narrators of the Sahih.