It is narrated from Sayyiduna al-Bara' (may Allah be pleased with him) that the first of the Muhajirun to come to us in Madinah was Sayyiduna Mus'ab bin Umayr (may Allah be pleased with him).

Urwah bin al-Zubayr narrates from his father that he said: The Messenger of Allah (peace and blessings be upon him) was sitting in Quba' with a few people when Sayyiduna Mus'ab bin Umayr (may Allah be pleased with him) appeared, wearing a cloak that barely covered his body. The people lowered their heads (on seeing his poverty). He came and gave the greeting of peace, and the people returned his greeting. Then the Prophet (peace and blessings be upon him) spoke well of him and praised him, and then said: "I saw him in Makkah with his parents, where they kept him in great honour and luxury, and there was no young man of Quraysh like him (in handsomeness and comfort). Then he left all of that and set out solely for the pleasure of Allah and the support of His Messenger. Remember! A time will come upon you when Persia and Rome will be conquered; one of you will wear one garment in the morning and another in the evening, and bowls (of fine food) will be brought before you morning and evening." The Companions said: O Messenger of Allah! Will we be better on that day or today? He (peace and blessings be upon him) said: "Rather, you are better today than on those (coming) days; for if you knew of the world what I know, your souls would turn away from it in weariness."